LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - DELINQUENT LOANS (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Aging or recorded investments in loans
Total Loans Delinquent	$ 9,013	$ 8,958
Total Loans Not Delinquent	3,907,307	3,801,820
Carrying value of loans	$ 3,916,320	$ 3,810,778
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.23%	0.24%
30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 4,453	$ 4,400
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.11%	0.12%
60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 1,647	$ 912
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.04%	0.02%
90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 2,913	$ 3,646
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.07%	0.10%
Core Banking Activities
Aging or recorded investments in loans
Total Loans Delinquent	$ 6,844	$ 6,821
Total Loans Not Delinquent	3,867,366	3,765,010
Carrying value of loans	3,874,210	3,771,831
Core Banking Activities | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	2,951	2,649
Core Banking Activities | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,282	608
Core Banking Activities | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	2,611	3,564
Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	6,844	6,821
Total Loans Not Delinquent	3,266,736	3,179,571
Carrying value of loans	3,273,580	3,186,392
Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	2,951	2,649
Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,282	608
Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	2,611	3,564
Republic Processing Group
Aging or recorded investments in loans
Total Loans Delinquent	2,169	2,137
Total Loans Not Delinquent	39,941	36,810
Carrying value of loans	42,110	38,947
Republic Processing Group | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,502	1,751
Republic Processing Group | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	365	304
Republic Processing Group | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	302	82
Residential Real Estate - Owner Occupied | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	3,720	4,554
Total Loans Not Delinquent	957,685	995,594
Carrying value of loans	961,405	1,000,148
Residential Real Estate - Owner Occupied | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,744	1,696
Residential Real Estate - Owner Occupied | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	566	337
Residential Real Estate - Owner Occupied | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,410	2,521
Residential Real Estate - Owner Occupied - Correspondent | Traditional Banking
Aging or recorded investments in loans
Total Loans Not Delinquent	129,792	149,028
Carrying value of loans	129,792	149,028
Residential Real Estate - Non Owner Occupied | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	84	46
Total Loans Not Delinquent	172,600	156,559
Carrying value of loans	172,684	156,605
Residential Real Estate - Non Owner Occupied | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	58
Residential Real Estate - Non Owner Occupied | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	26	46
Commercial Real Estate | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	1,005	425
Total Loans Not Delinquent	1,103,021	1,060,071
Carrying value of loans	1,104,026	1,060,496
Commercial Real Estate | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	269	8
Commercial Real Estate | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	244
Commercial Real Estate | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	492	417
Construction & land development | Traditional Banking
Aging or recorded investments in loans
Total Loans Not Delinquent	137,877	119,650
Carrying value of loans	137,877	119,650
Commercial & Industrial | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	454	342
Total Loans Not Delinquent	313,979	258,684
Carrying value of loans	314,433	259,026
Commercial & Industrial | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	154	342
Commercial & Industrial | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	300
Commercial & Industrial | Republic Processing Group
Aging or recorded investments in loans
Total Loans Not Delinquent		6,695
Carrying value of loans		6,695
Lease Financing Receivables | Traditional Banking
Aging or recorded investments in loans
Total Loans Not Delinquent	14,371	13,614
Carrying value of loans	14,371	13,614
Home equity lines of credit | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	1,144	970
Total Loans Not Delinquent	343,802	340,315
Carrying value of loans	344,946	341,285
Home equity lines of credit | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	432	316
Home equity lines of credit | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	84	160
Home equity lines of credit | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	628	494
Consumer: Credit cards | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	65	18
Total Loans Not Delinquent	17,814	13,396
Carrying value of loans	17,879	13,414
Consumer: Credit cards | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	54	14
Consumer: Credit cards | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	11	4
Consumer: Overdrafts | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	192	161
Total Loans Not Delinquent	710	642
Carrying value of loans	902	803
Consumer: Overdrafts | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	192	159
Consumer: Overdrafts | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent		1
Consumer: Overdrafts | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent		1
Consumer: Automobile loan | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	51
Total Loans Not Delinquent	59,870	52,579
Carrying value of loans	59,921	52,579
Consumer: Automobile loan | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	25
Consumer: Automobile loan | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	26
Other consumer | Traditional Banking
Aging or recorded investments in loans
Total Loans Delinquent	129	305
Total Loans Not Delinquent	15,215	19,439
Carrying value of loans	15,344	19,744
Other consumer | Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	48	114
Other consumer | Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	52	106
Other consumer | Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	29	85
Warehouse lines of credit | Warehouse Lending
Aging or recorded investments in loans
Total Loans Not Delinquent	600,630	585,439
Carrying value of loans	600,630	585,439
Republic Credit Solutions | Republic Processing Group
Aging or recorded investments in loans
Total Loans Delinquent	2,169	2,137
Total Loans Not Delinquent	39,941	30,115
Carrying value of loans	42,110	32,252
Republic Credit Solutions | Republic Processing Group | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	1,502	1,751
Republic Credit Solutions | Republic Processing Group | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	365	304
Republic Credit Solutions | Republic Processing Group | 90 + Days Delinquent
Aging or recorded investments in loans
Total Loans Delinquent	$ 302	$ 82