LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 5,837,731	$ 5,542,840
Total Loans	5,941,098	5,671,462	$ 5,510,385
Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	757,685	737,958
Total Loans	765,997	749,720	671,234
Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	808,176	826,859
Total Loans	831,880	860,086	874,582
Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,351,458	1,255,367
Total Loans	1,370,745	1,270,480	1,217,646
Multifamily Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	335,631	320,701
Total Loans	337,723	322,528	316,474
Commercial & Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	464,794	431,916
Total Loans	469,054	435,365	426,193
Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	957,393	928,312
Total Loans	992,457	978,469	991,592
HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	512,967	509,124
Total Loans	519,196	516,726	512,123
Consumer and all other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	406,995	301,339
Total Loans	409,471	304,027	284,121
Purchased Impaired [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	60,224	64,455
Total Loans	67,170	73,737	87,841
Purchased Impaired [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,196	5,025
Purchased Impaired [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,750	4,257
Purchased Impaired [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,649	5,376
Total Loans	5,013	5,986	8,397
Purchased Impaired [Member] | Construction and Land Development [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3	369
Purchased Impaired [Member] | Construction and Land Development [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	361	241
Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	18,099	24,837
Total Loans	20,692	27,388	29,838
Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,098	1,139
Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,495	1,412
Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	17,331	12,562
Total Loans	18,297	13,519	16,982
Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	795	755
Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	171	202
Purchased Impaired [Member] | Multifamily Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,092	1,555
Total Loans	2,092	1,555	3,004
Purchased Impaired [Member] | Multifamily Real Estate [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Impaired [Member] | Multifamily Real Estate [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Impaired [Member] | Commercial & Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,205	1,583
Total Loans	1,354	1,813	2,940
Purchased Impaired [Member] | Commercial & Industrial [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	149	209
Purchased Impaired [Member] | Commercial & Industrial [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	21
Purchased Impaired [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,578	17,093
Total Loans	17,805	21,159	24,157
Purchased Impaired [Member] | Residential 1-4 Family [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,014	2,143
Purchased Impaired [Member] | Residential 1-4 Family [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,213	1,923
Purchased Impaired [Member] | HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	870	923
Total Loans	1,517	1,791	1,840
Purchased Impaired [Member] | HELOC [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	137	410
Purchased Impaired [Member] | HELOC [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	510	458
Purchased Impaired [Member] | Consumer and all other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	400	526
Total Loans	400	526	$ 683
Purchased Impaired [Member] | Consumer and all other [Member] | 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Impaired [Member] | Consumer and all other [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 0	$ 0