LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Excluding Purchased Impaired Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 5,941,098	$ 5,671,462	$ 5,510,385
Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	765,997	749,720	671,234
Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	831,880	860,086	874,582
Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,370,745	1,270,480	1,217,646
Multifamily Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	337,723	322,528	316,474
Commercial & Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	469,054	435,365	426,193
Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	992,457	978,469	991,592
Auto [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	244,575	234,061	216,420
HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	519,196	516,726	512,123
Consumer and all other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	409,471	304,027	$ 284,121
Excluding Purchased Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,873,928	5,597,725
Excluding Purchased Impaired [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,658,622	5,372,500
Excluding Purchased Impaired [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	157,996	161,222
Excluding Purchased Impaired [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	54,065	58,872
Excluding Purchased Impaired [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,245	5,131
Excluding Purchased Impaired [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	760,984	743,734
Excluding Purchased Impaired [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	684,002	663,067
Excluding Purchased Impaired [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	47,592	52,650
Excluding Purchased Impaired [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	29,274	27,980
Excluding Purchased Impaired [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	116	37
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	811,188	832,698
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	779,574	800,979
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	25,352	20,856
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,262	8,931
Excluding Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	1,932
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,352,448	1,256,961
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,317,192	1,228,956
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	30,997	22,341
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,259	5,664
Excluding Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Excluding Purchased Impaired [Member] | Multifamily Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	335,631	320,973
Excluding Purchased Impaired [Member] | Multifamily Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	324,718	315,128
Excluding Purchased Impaired [Member] | Multifamily Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,136	2,017
Excluding Purchased Impaired [Member] | Multifamily Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,777	3,828
Excluding Purchased Impaired [Member] | Multifamily Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Excluding Purchased Impaired [Member] | Commercial & Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	467,700	433,552
Excluding Purchased Impaired [Member] | Commercial & Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	449,708	414,333
Excluding Purchased Impaired [Member] | Commercial & Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	15,953	16,724
Excluding Purchased Impaired [Member] | Commercial & Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,039	2,396
Excluding Purchased Impaired [Member] | Commercial & Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	99
Excluding Purchased Impaired [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	974,652	957,310
Excluding Purchased Impaired [Member] | Residential 1-4 Family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	943,154	912,839
Excluding Purchased Impaired [Member] | Residential 1-4 Family [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,467	34,728
Excluding Purchased Impaired [Member] | Residential 1-4 Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,876	8,037
Excluding Purchased Impaired [Member] | Residential 1-4 Family [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,155	1,706
Excluding Purchased Impaired [Member] | Auto [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	244,575	234,061
Excluding Purchased Impaired [Member] | Auto [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	242,596	230,670
Excluding Purchased Impaired [Member] | Auto [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,698	3,109
Excluding Purchased Impaired [Member] | Auto [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	103	194
Excluding Purchased Impaired [Member] | Auto [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	178	88
Excluding Purchased Impaired [Member] | HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	517,679	514,935
Excluding Purchased Impaired [Member] | HELOC [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	511,936	507,514
Excluding Purchased Impaired [Member] | HELOC [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,718	4,801
Excluding Purchased Impaired [Member] | HELOC [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,438	1,611
Excluding Purchased Impaired [Member] | HELOC [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	587	1,009
Excluding Purchased Impaired [Member] | Consumer and all other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	409,071	303,501
Excluding Purchased Impaired [Member] | Consumer and all other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	405,742	299,014
Excluding Purchased Impaired [Member] | Consumer and all other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,083	3,996
Excluding Purchased Impaired [Member] | Consumer and all other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	37	231
Excluding Purchased Impaired [Member] | Consumer and all other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 209	$ 260