LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 6,046,978	$ 5,542,840
Total Loans	6,148,918	5,671,462	$ 5,543,621
Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	769,308	737,958
Total Loans	776,430	749,720	694,645
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	834,389	826,859
Total Loans	857,142	860,086	863,578
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,436,363	1,255,367
Total Loans	1,454,828	1,270,480	1,223,607
Multifamily Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	337,234	320,701
Total Loans	339,313	322,528	329,959
Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	506,673	431,916
Total Loans	509,857	435,365	409,657
Residential 1-4 Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	963,919	928,312
Total Loans	999,361	978,469	987,788
HELOC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	517,229	509,124
Total Loans	524,097	516,726	514,362
Consumer and all other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	429,019	301,339
Total Loans	432,702	304,027	294,031
Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	55,780	64,455
Total Loans	62,346	73,737	78,606
Purchased Impaired | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,540	5,025
Purchased Impaired | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,026	4,257
Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,176	5,376
Total Loans	3,205	5,986	7,628
Purchased Impaired | Construction and Land Development | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	29	369
Purchased Impaired | Construction and Land Development | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	241
Purchased Impaired | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	17,693	24,837
Total Loans	19,064	27,388	28,694
Purchased Impaired | Commercial Real Estate - Owner Occupied | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	737	1,139
Purchased Impaired | Commercial Real Estate - Owner Occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	634	1,412
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	16,095	12,562
Total Loans	18,141	13,519	13,326
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,921	755
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	125	202
Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,079	1,555
Total Loans	2,079	1,555	1,943
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	1,043	1,583
Total Loans	1,145	1,813	2,245
Purchased Impaired | Commercial & Industrial | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	45	209
Purchased Impaired | Commercial & Industrial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	57	21
Purchased Impaired | Residential 1-4 Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	14,367	17,093
Total Loans	16,828	21,159	22,379
Purchased Impaired | Residential 1-4 Family | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,686	2,143
Purchased Impaired | Residential 1-4 Family | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	775	1,923
Purchased Impaired | HELOC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	941	923
Total Loans	1,498	1,791	1,812
Purchased Impaired | HELOC | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	122	410
Purchased Impaired | HELOC | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	435	458
Purchased Impaired | Consumer and all other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	386	526
Total Loans	386	526	$ 579
Purchased Impaired | Consumer and all other | 30 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Impaired | Consumer and all other | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 0	$ 0