LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 6,663,344	$ 6,209,924
Total Loans	6,771,490	6,307,060	$ 5,941,098
Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	790,874	744,702
Total Loans	799,938	751,131	765,997
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	865,702	836,682
Total Loans	888,285	857,805	831,880
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,674,857	1,544,623
Total Loans	1,698,329	1,564,295	1,370,745
Multifamily Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	364,710	332,063
Total Loans	367,257	334,276	337,723
Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	561,750	548,702
Total Loans	568,602	551,526	469,054
Residential 1-4 Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,034,795	998,448
Total Loans	1,066,519	1,029,547	992,457
HELOC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	528,960	520,833
Total Loans	535,088	526,884	519,196
Consumer and all other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	569,641	424,967
Total Loans	573,310	429,525	409,471
Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	51,307	55,244
Total Loans	56,167	59,292	67,170
Purchased Impaired | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,104	2,197
Purchased Impaired | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,756	1,851
Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,627	2,838
Total Loans	2,694	2,922	5,013
Purchased Impaired | Construction and Land Development | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	67	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	16,917	17,553
Total Loans	17,906	18,343	20,692
Purchased Impaired | Commercial Real Estate - Owner Occupied | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	339	271
Purchased Impaired | Commercial Real Estate - Owner Occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	650	519
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,037	16,768
Total Loans	16,308	17,303	18,297
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,195	409
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	76	126
Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,047	2,066
Total Loans	2,047	2,066	2,092
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	642	974
Total Loans	751	1,074	1,354
Purchased Impaired | Commercial & Industrial | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	109	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	13,046	13,957
Total Loans	15,087	16,200	17,805
Purchased Impaired | Residential 1-4 Family | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,138	1,298
Purchased Impaired | Residential 1-4 Family | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	903	945
Purchased Impaired | HELOC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	808	865
Total Loans	1,156	1,161	1,517
Purchased Impaired | HELOC | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	221	175
Purchased Impaired | HELOC | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	127	121
Purchased Impaired | Consumer and all other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	183	223
Total Loans	218	223	$ 400
Purchased Impaired | Consumer and all other | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	35	0
Purchased Impaired | Consumer and all other | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 0	$ 0