Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Excluding Purchased Impaired Loans) (Details)

v3.3.0.814
LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Excluding Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating $ 5,543,621 $ 5,345,996 $ 5,171,003
Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 429,645 341,280  
Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 863,551 875,443  
Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 1,586,334 1,509,159  
Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 187,182 211,225  
Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 436,340 412,494  
Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 444,199 393,776  
Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 89,344 81,106  
Excluding Purchased Impaired [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 3,966,919 3,730,248  
Excluding Purchased Impaired [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 427,186 337,498  
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 834,856 844,276  
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 1,571,162 1,480,290  
Excluding Purchased Impaired [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 182,041 203,798  
Excluding Purchased Impaired [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 421,173 395,615  
Excluding Purchased Impaired [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 441,950 389,921  
Excluding Purchased Impaired [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 88,551 78,850  
Excluding Purchased Impaired [Member] | 0-3 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 989,887    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 37,671    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 179,846    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 467,026    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 12,036    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 63,146    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 186,807    
Excluding Purchased Impaired [Member] | 0-3 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 43,355    
Excluding Purchased Impaired [Member] | 1-3 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   805,908  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   22,512  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   185,789  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   356,263  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   11,162  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   59,638  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   138,973  
Excluding Purchased Impaired [Member] | 1-3 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating   31,571  
Excluding Purchased Impaired [Member] | 4 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 2,764,246 2,662,344  
Excluding Purchased Impaired [Member] | 4 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 355,150 289,064  
Excluding Purchased Impaired [Member] | 4 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 622,852 620,587  
Excluding Purchased Impaired [Member] | 4 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 1,048,396 1,041,515  
Excluding Purchased Impaired [Member] | 4 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 122,236 128,281  
Excluding Purchased Impaired [Member] | 4 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 339,683 311,900  
Excluding Purchased Impaired [Member] | 4 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 235,543 230,084  
Excluding Purchased Impaired [Member] | 4 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 40,386 40,913  
Excluding Purchased Impaired [Member] | 5 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 85,364 89,056  
Excluding Purchased Impaired [Member] | 5 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 22,661 11,932  
Excluding Purchased Impaired [Member] | 5 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 13,967 15,003  
Excluding Purchased Impaired [Member] | 5 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 19,654 22,358  
Excluding Purchased Impaired [Member] | 5 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 7,307 16,803  
Excluding Purchased Impaired [Member] | 5 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 8,430 9,750  
Excluding Purchased Impaired [Member] | 5 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 10,732 9,392  
Excluding Purchased Impaired [Member] | 5 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 2,613 3,818  
Excluding Purchased Impaired [Member] | 6 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 64,321 63,672  
Excluding Purchased Impaired [Member] | 6 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 8,857 10,906  
Excluding Purchased Impaired [Member] | 6 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 6,526 7,688  
Excluding Purchased Impaired [Member] | 6 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 22,369 28,388  
Excluding Purchased Impaired [Member] | 6 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 15,792 4,783  
Excluding Purchased Impaired [Member] | 6 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 5,210 6,680  
Excluding Purchased Impaired [Member] | 6 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 4,669 4,383  
Excluding Purchased Impaired [Member] | 6 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 898 844  
Excluding Purchased Impaired [Member] | 7 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 60,869 109,268  
Excluding Purchased Impaired [Member] | 7 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 2,847 3,084  
Excluding Purchased Impaired [Member] | 7 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 9,433 15,209  
Excluding Purchased Impaired [Member] | 7 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 13,717 31,766  
Excluding Purchased Impaired [Member] | 7 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 24,670 42,769  
Excluding Purchased Impaired [Member] | 7 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 4,704 7,647  
Excluding Purchased Impaired [Member] | 7 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 4,199 7,089  
Excluding Purchased Impaired [Member] | 7 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating 1,299 $ 1,704  
Excluding Purchased Impaired [Member] | 8 [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating $ 2,232  
Excluding Purchased Impaired [Member] | 8 [Member] | Commercial Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating  
Excluding Purchased Impaired [Member] | 8 [Member] | Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating $ 2,232  
Excluding Purchased Impaired [Member] | 8 [Member] | Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating  
Excluding Purchased Impaired [Member] | 8 [Member] | Raw Land and Lots [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating  
Excluding Purchased Impaired [Member] | 8 [Member] | Single Family Investment Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating  
Excluding Purchased Impaired [Member] | 8 [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating  
Excluding Purchased Impaired [Member] | 8 [Member] | Other Commercial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans receivables related risk rating