LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 6,307,060	$ 5,671,462	$ 5,345,996
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	751,131	749,720	656,380
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	857,805	860,086	869,200
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,564,295	1,270,480	1,183,514
Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	334,276	322,528	297,366
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	551,526	435,365	374,096
Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,029,547	978,469	983,074
Auto
Financing Receivable, Recorded Investment [Line Items]
Total Loans	262,071	234,061	207,813
HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	526,884	516,726	523,341
Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	429,525	304,027	251,212
Purchased Impaired
Financing Receivable, Recorded Investment [Line Items]
Total Loans	59,292	73,737	105,788
Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,922	5,986	11,890
Purchased Impaired | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	18,343	27,388	31,167
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,303	13,519	25,834
Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,066	1,555	2,994
Purchased Impaired | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,074	1,813	3,440
Purchased Impaired | Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,200	21,159	26,619
Purchased Impaired | Auto
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0	0
Purchased Impaired | HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,161	1,791	2,000
Purchased Impaired | Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	223	526	$ 1,844
Purchased Impaired | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	27,569	22,339
Purchased Impaired | Pass | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,092	2,059
Purchased Impaired | Pass | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,520	5,260
Purchased Impaired | Pass | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,927	4,442
Purchased Impaired | Pass | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	343	356
Purchased Impaired | Pass | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	107	144
Purchased Impaired | Pass | Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,557	9,098
Purchased Impaired | Pass | HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	857	923
Purchased Impaired | Pass | Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	166	57
Purchased Impaired | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	21,837	33,862
Purchased Impaired | Special Mention | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,432	1,778
Purchased Impaired | Special Mention | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,889	15,530
Purchased Impaired | Special Mention | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,638	7,827
Purchased Impaired | Special Mention | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,723	1,199
Purchased Impaired | Special Mention | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	480	359
Purchased Impaired | Special Mention | Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,455	6,380
Purchased Impaired | Special Mention | HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	183	410
Purchased Impaired | Special Mention | Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	37	379
Purchased Impaired | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,256	15,760
Purchased Impaired | Substandard | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	398	1,908
Purchased Impaired | Substandard | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,934	6,598
Purchased Impaired | Substandard | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,738	1,250
Purchased Impaired | Substandard | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Purchased Impaired | Substandard | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	487	1,289
Purchased Impaired | Substandard | Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,672	4,605
Purchased Impaired | Substandard | HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7	20
Purchased Impaired | Substandard | Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	20	90
Purchased Impaired | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	630	1,776
Purchased Impaired | Doubtful | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	241
Purchased Impaired | Doubtful | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Purchased Impaired | Doubtful | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Purchased Impaired | Doubtful | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Purchased Impaired | Doubtful | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	21
Purchased Impaired | Doubtful | Residential 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total Loans	516	1,076
Purchased Impaired | Doubtful | HELOC
Financing Receivable, Recorded Investment [Line Items]
Total Loans	114	438
Purchased Impaired | Doubtful | Consumer and all other
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0	$ 0