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)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Excluding Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 6,771,490 $ 6,307,060 $ 5,941,098
Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 799,938 751,131 765,997
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 888,285 857,805 831,880
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,698,329 1,564,295 1,370,745
Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 367,257 334,276 337,723
Commercial & Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 568,602 551,526 469,054
Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,066,519 1,029,547 992,457
Auto      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 274,162 262,071 244,575
HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 535,088 526,884 519,196
Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 573,310 429,525 $ 409,471
Excluding Purchased Impaired      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 6,715,323 6,247,768  
Excluding Purchased Impaired | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 6,493,931 6,017,055  
Excluding Purchased Impaired | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 179,006 198,078  
Excluding Purchased Impaired | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 38,986 28,617  
Excluding Purchased Impaired | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 3,400 4,018  
Excluding Purchased Impaired | Construction and Land Development      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 797,244 748,209  
Excluding Purchased Impaired | Construction and Land Development | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 726,106 667,018  
Excluding Purchased Impaired | Construction and Land Development | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 58,155 69,311  
Excluding Purchased Impaired | Construction and Land Development | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 12,883 11,857  
Excluding Purchased Impaired | Construction and Land Development | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 100 23  
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 870,379 839,462  
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 824,793 801,565  
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 41,397 32,364  
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 4,189 5,533  
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,682,021 1,546,992  
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,648,876 1,505,153  
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 23,666 37,631  
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 9,479 4,208  
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Excluding Purchased Impaired | Multifamily Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 365,210 332,210  
Excluding Purchased Impaired | Multifamily Real Estate | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 358,597 312,711  
Excluding Purchased Impaired | Multifamily Real Estate | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 6,613 19,499  
Excluding Purchased Impaired | Multifamily Real Estate | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Excluding Purchased Impaired | Multifamily Real Estate | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Excluding Purchased Impaired | Commercial & Industrial      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 567,851 550,452  
Excluding Purchased Impaired | Commercial & Industrial | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 543,951 539,999  
Excluding Purchased Impaired | Commercial & Industrial | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 18,291 9,391  
Excluding Purchased Impaired | Commercial & Industrial | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 5,609 1,062  
Excluding Purchased Impaired | Commercial & Industrial | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 0 0  
Excluding Purchased Impaired | Residential 1-4 Family      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,051,432 1,013,347  
Excluding Purchased Impaired | Residential 1-4 Family | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,021,053 986,973  
Excluding Purchased Impaired | Residential 1-4 Family | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 22,903 18,518  
Excluding Purchased Impaired | Residential 1-4 Family | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 4,995 4,813  
Excluding Purchased Impaired | Residential 1-4 Family | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,481 3,043  
Excluding Purchased Impaired | Auto      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 274,162 262,071  
Excluding Purchased Impaired | Auto | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 271,701 258,188  
Excluding Purchased Impaired | Auto | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,254 3,648  
Excluding Purchased Impaired | Auto | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 77 135  
Excluding Purchased Impaired | Auto | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 130 100  
Excluding Purchased Impaired | HELOC      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 533,932 525,723  
Excluding Purchased Impaired | HELOC | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 528,606 519,928  
Excluding Purchased Impaired | HELOC | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 3,501 4,225  
Excluding Purchased Impaired | HELOC | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,245 969  
Excluding Purchased Impaired | HELOC | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 580 601  
Excluding Purchased Impaired | Consumer and all other      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 573,092 429,302  
Excluding Purchased Impaired | Consumer and all other | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 570,248 425,520  
Excluding Purchased Impaired | Consumer and all other | Special Mention      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,226 3,491  
Excluding Purchased Impaired | Consumer and all other | Substandard      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 509 40  
Excluding Purchased Impaired | Consumer and all other | Doubtful      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 109 $ 251