Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details)

v3.8.0.1
LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current $ 6,793,302 $ 6,209,924  
Total Loans 6,898,729 6,307,060 $ 6,148,918
Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 825,666 744,702  
Total Loans 841,738 751,131 776,430
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 880,575 836,682  
Total Loans 903,523 857,805 857,142
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 1,729,184 1,544,623  
Total Loans 1,748,039 1,564,295 1,454,828
Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 368,609 332,063  
Total Loans 368,686 334,276 339,313
Commercial & Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 550,731 548,702  
Total Loans 554,522 551,526 509,857
Residential 1-4 Family      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 1,053,440 998,448  
Total Loans 1,083,112 1,029,547 999,361
HELOC      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 529,936 520,833  
Total Loans 535,446 526,884 524,097
Consumer and all other      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 581,614 424,967  
Total Loans 587,091 429,525 432,702
Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 46,155 55,244  
Total Loans 51,041 59,292 62,346
Purchased Impaired | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,958 2,197  
Purchased Impaired | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,928 1,851  
Purchased Impaired | Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 2,964 2,838  
Total Loans 3,026 2,922 3,205
Purchased Impaired | Construction and Land Development | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 62 0  
Purchased Impaired | Construction and Land Development | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 84  
Purchased Impaired | Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 16,562 17,553  
Total Loans 17,668 18,343 19,064
Purchased Impaired | Commercial Real Estate - Owner Occupied | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 463 271  
Purchased Impaired | Commercial Real Estate - Owner Occupied | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 643 519  
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 13,026 16,768  
Total Loans 14,376 17,303 18,141
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 318 409  
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,032 126  
Purchased Impaired | Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 77 2,066  
Total Loans 77 2,066 2,079
Purchased Impaired | Multifamily Real Estate | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Purchased Impaired | Multifamily Real Estate | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Purchased Impaired | Commercial & Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 625 974  
Total Loans 625 1,074 1,145
Purchased Impaired | Commercial & Industrial | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 44  
Purchased Impaired | Commercial & Industrial | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 56  
Purchased Impaired | Residential 1-4 Family      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 12,003 13,957  
Total Loans 14,077 16,200 16,828
Purchased Impaired | Residential 1-4 Family | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 949 1,298  
Purchased Impaired | Residential 1-4 Family | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,125 945  
Purchased Impaired | HELOC      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 722 865  
Total Loans 982 1,161 1,498
Purchased Impaired | HELOC | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 132 175  
Purchased Impaired | HELOC | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 128 121  
Purchased Impaired | Consumer and all other      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Current 176 223  
Total Loans 210 223 $ 386
Purchased Impaired | Consumer and all other | 30 To 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 34 0  
Purchased Impaired | Consumer and all other | Greater than 90 Days      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due $ 0 $ 0