Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Deferred Fees and Costs) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Deferred Fees and Costs) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net $ 5,941,098 $ 5,671,462 $ 5,510,385
Loans receivable, deferred fees and costs 1,900 3,000  
Construction and Land Development [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 765,997 749,720 671,234
Commercial Real Estate - Owner Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 831,880 860,086 874,582
Commercial Real Estate - Non-Owner Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 1,370,745 1,270,480 1,217,646
Multifamily Real Estate [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 337,723 322,528 316,474
Commercial & Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 469,054 435,365 426,193
Residential 1-4 Family [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 992,457 978,469 991,592
Auto [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 244,575 234,061 216,420
HELOC [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net 519,196 516,726 512,123
Consumer and all other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total loans held for investment, net $ 409,471 $ 304,027 $ 284,121