LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - DELINQUENT LOANS (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Aging or recorded investments in loans
Total Loans Delinquent	$ 8,714	$ 11,731
Total Loans Not Delinquent	3,814,317	3,314,879
Carrying value of loans	$ 3,823,031	$ 3,326,610
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.23%	0.35%
30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 4,354	$ 3,088
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.11%	0.09%
60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 1,538	$ 1,107
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.04%	0.03%
90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 2,822	$ 7,536
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.07%	0.23%
Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Total Loans Delinquent	$ 5,045	$ 6,882
Total Loans Not Delinquent	1,023,426	1,075,052
Carrying value of loans	1,028,471	1,081,934
Residential Real Estate - Owner Occupied | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	2,168	1,960
Residential Real Estate - Owner Occupied | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,029	1,044
Residential Real Estate - Owner Occupied | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,848	3,878
Owner Occupied - Correspondent
Aging or recorded investments in loans
Total Loans Not Delinquent	159,955	249,344
Carrying value of loans	159,955	249,344
Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Total Loans Delinquent	296	53
Total Loans Not Delinquent	149,314	116,241
Carrying value of loans	149,610	116,294
Residential Real Estate - Non Owner Occupied | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	287	14
Residential Real Estate - Non Owner Occupied | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	9	39
Commercial Real Estate
Aging or recorded investments in loans
Total Loans Delinquent	436	1,111
Total Loans Not Delinquent	999,416	823,776
Carrying value of loans	999,852	824,887
Commercial Real Estate | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	17	178
Commercial Real Estate | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	419	933
Commercial real estate - purchased whole loans
Aging or recorded investments in loans
Total Loans Not Delinquent	36,085	35,674
Carrying value of loans	36,085	35,674
Construction & land development
Aging or recorded investments in loans
Total Loans Delinquent	41	1,500
Total Loans Not Delinquent	94,248	65,000
Carrying value of loans	94,289	66,500
Construction & land development | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	41
Construction & land development | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent		1,500
Commercial & Industrial
Aging or recorded investments in loans
Total Loans Delinquent		299
Total Loans Not Delinquent	250,094	229,422
Carrying value of loans	250,094	229,721
Commercial & Industrial | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent		299
Lease Financing Receivables
Aging or recorded investments in loans
Total Loans Not Delinquent	12,186	8,905
Carrying value of loans	12,186	8,905
Warehouse lines of credit
Aging or recorded investments in loans
Total Loans Not Delinquent	661,186	386,729
Carrying value of loans	661,186	386,729
Home equity lines of credit
Aging or recorded investments in loans
Total Loans Delinquent	1,695	1,393
Total Loans Not Delinquent	333,421	287,801
Carrying value of loans	335,116	289,194
Home equity lines of credit | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	912	206
Home equity lines of credit | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	426	1
Home equity lines of credit | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	357	1,186
Consumer: Republic Processing Group Loans
Aging or recorded investments in loans
Total Loans Delinquent	664	246
Total Loans Not Delinquent	15,789	6,958
Carrying value of loans	16,453	7,204
Consumer: Republic Processing Group Loans | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	561	246
Consumer: Republic Processing Group Loans | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	21
Consumer: Republic Processing Group Loans | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	82
Consumer: Credit cards
Aging or recorded investments in loans
Total Loans Delinquent	28	12
Total Loans Not Delinquent	12,553	11,056
Carrying value of loans	12,581	11,068
Consumer: Credit cards | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	23	10
Consumer: Credit cards | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	5	2
Consumer: Overdrafts
Aging or recorded investments in loans
Total Loans Delinquent	185	133
Total Loans Not Delinquent	610	552
Carrying value of loans	795	685
Consumer: Overdrafts | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	185	133
Consumer: Purchased Whole Loans
Aging or recorded investments in loans
Total Loans Delinquent	284	47
Total Loans Not Delinquent	6,611	5,845
Carrying value of loans	6,895	5,892
Consumer: Purchased Whole Loans | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	127	5
Consumer: Purchased Whole Loans | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	50	42
Consumer: Purchased Whole Loans | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	107
Other consumer
Aging or recorded investments in loans
Total Loans Delinquent	40	55
Total Loans Not Delinquent	59,423	12,524
Carrying value of loans	59,463	12,579
Other consumer | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	33	37
Other consumer | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 7	$ 18