Annual report pursuant to Section 13 and 15(d)

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

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 6,307,060 $ 5,671,462 $ 5,345,996
Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 751,131 749,720 656,380
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 857,805 860,086 869,200
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,564,295 1,270,480 1,183,514
Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 334,276 322,528 297,366
Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 551,526 435,365 374,096
Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,029,547 978,469 983,074
Auto      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 262,071 234,061 207,813
HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 526,884 516,726 523,341
Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 429,525 304,027 251,212
Purchased Impaired      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 59,292 73,737 105,788
Purchased Impaired | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,922 5,986 11,890
Purchased Impaired | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 18,343 27,388 31,167
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 17,303 13,519 25,834
Purchased Impaired | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,066 1,555 2,994
Purchased Impaired | Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,074 1,813 3,440
Purchased Impaired | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 16,200 21,159 26,619
Purchased Impaired | Auto      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0 0
Purchased Impaired | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,161 1,791 2,000
Purchased Impaired | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 223 526 $ 1,844
Purchased Impaired | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 27,569 22,339  
Purchased Impaired | Pass | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,092 2,059  
Purchased Impaired | Pass | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 5,520 5,260  
Purchased Impaired | Pass | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 10,927 4,442  
Purchased Impaired | Pass | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 343 356  
Purchased Impaired | Pass | Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 107 144  
Purchased Impaired | Pass | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 8,557 9,098  
Purchased Impaired | Pass | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 857 923  
Purchased Impaired | Pass | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 166 57  
Purchased Impaired | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 21,837 33,862  
Purchased Impaired | Special Mention | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,432 1,778  
Purchased Impaired | Special Mention | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 8,889 15,530  
Purchased Impaired | Special Mention | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 4,638 7,827  
Purchased Impaired | Special Mention | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,723 1,199  
Purchased Impaired | Special Mention | Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 480 359  
Purchased Impaired | Special Mention | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 4,455 6,380  
Purchased Impaired | Special Mention | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 183 410  
Purchased Impaired | Special Mention | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 37 379  
Purchased Impaired | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 9,256 15,760  
Purchased Impaired | Substandard | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 398 1,908  
Purchased Impaired | Substandard | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 3,934 6,598  
Purchased Impaired | Substandard | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,738 1,250  
Purchased Impaired | Substandard | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Purchased Impaired | Substandard | Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 487 1,289  
Purchased Impaired | Substandard | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,672 4,605  
Purchased Impaired | Substandard | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 7 20  
Purchased Impaired | Substandard | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 20 90  
Purchased Impaired | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 630 1,776  
Purchased Impaired | Doubtful | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 241  
Purchased Impaired | Doubtful | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Purchased Impaired | Doubtful | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Purchased Impaired | Doubtful | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Purchased Impaired | Doubtful | Commercial and Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 21  
Purchased Impaired | Doubtful | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 516 1,076  
Purchased Impaired | Doubtful | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 114 438  
Purchased Impaired | Doubtful | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 0 $ 0