LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - RISK CATEGORY (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Risk category of rated loans
Loans	$ 3,957,512	$ 3,810,778
Pass
Risk category of rated loans
Loans	2,198,350	2,024,233
Special Mention
Risk category of rated loans
Loans	26,630	30,702
Substandard
Risk category of rated loans
Loans	21,928	21,412
Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	5,582	7,908
Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,770	2,366
Rated Loans
Risk category of rated loans
Loans	2,254,260	2,086,621
Core Banking Activities
Risk category of rated loans
Loans	3,910,381	3,771,831
Core Banking Activities | Pass
Risk category of rated loans
Loans	2,198,085	2,017,538
Core Banking Activities | Special Mention
Risk category of rated loans
Loans	26,630	30,702
Core Banking Activities | Substandard
Risk category of rated loans
Loans	21,077	21,330
Core Banking Activities | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	5,582	7,908
Core Banking Activities | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,770	2,366
Core Banking Activities | Rated Loans
Risk category of rated loans
Loans	2,253,144	2,079,844
Traditional Banking
Risk category of rated loans
Loans	3,339,221	3,186,392
Traditional Banking | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	933,726	1,000,148
Traditional Banking | Residential Real Estate - Owner Occupied - Correspondent
Risk category of rated loans
Loans	125,643	149,028
Traditional Banking | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	193,379	156,605
Traditional Banking | Commercial Real Estate
Risk category of rated loans
Loans	1,161,225	1,060,496
Traditional Banking | Construction & land development
Risk category of rated loans
Loans	138,837	119,650
Traditional Banking | Commercial & Industrial
Risk category of rated loans
Loans	327,214	259,026
Traditional Banking | Lease Financing Receivables
Risk category of rated loans
Loans	15,367	13,614
Traditional Banking | Home equity lines of credit
Risk category of rated loans
Loans	346,154	341,285
Traditional Banking | Consumer: Credit cards
Risk category of rated loans
Loans	19,898	13,414
Traditional Banking | Consumer: Overdrafts
Risk category of rated loans
Loans	892	803
Traditional Banking | Consumer: Automobile loan
Risk category of rated loans
Loans	63,639	52,579
Traditional Banking | Other consumer
Risk category of rated loans
Loans	13,247	19,744
Traditional Banking | Pass
Risk category of rated loans
Loans	1,626,925	1,432,099
Traditional Banking | Pass | Commercial Real Estate
Risk category of rated loans
Loans	1,146,117	1,042,137
Traditional Banking | Pass | Construction & land development
Risk category of rated loans
Loans	138,095	118,769
Traditional Banking | Pass | Commercial & Industrial
Risk category of rated loans
Loans	326,846	257,579
Traditional Banking | Pass | Lease Financing Receivables
Risk category of rated loans
Loans	15,367	13,614
Traditional Banking | Pass | Home equity lines of credit
Risk category of rated loans
Loans	83
Traditional Banking | Pass | Other consumer
Risk category of rated loans
Loans	417
Traditional Banking | Special Mention
Risk category of rated loans
Loans	26,630	30,702
Traditional Banking | Special Mention | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	19,866	21,344
Traditional Banking | Special Mention | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	643	656
Traditional Banking | Special Mention | Commercial Real Estate
Risk category of rated loans
Loans	5,358	7,086
Traditional Banking | Special Mention | Construction & land development
Risk category of rated loans
Loans		90
Traditional Banking | Special Mention | Commercial & Industrial
Risk category of rated loans
Loans	263	1,270
Traditional Banking | Special Mention | Home equity lines of credit
Risk category of rated loans
Loans	83	256
Traditional Banking | Special Mention | Other consumer
Risk category of rated loans
Loans	417
Traditional Banking | Substandard
Risk category of rated loans
Loans	21,077	21,330
Traditional Banking | Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	12,180	13,117
Traditional Banking | Substandard | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	1,016	1,115
Traditional Banking | Substandard | Commercial Real Estate
Risk category of rated loans
Loans	4,977	4,224
Traditional Banking | Substandard | Construction & land development
Risk category of rated loans
Loans	742	791
Traditional Banking | Substandard | Commercial & Industrial
Risk category of rated loans
Loans	82	154
Traditional Banking | Substandard | Home equity lines of credit
Risk category of rated loans
Loans	1,743	1,763
Traditional Banking | Substandard | Consumer: Automobile loan
Risk category of rated loans
Loans	97
Traditional Banking | Substandard | Other consumer
Risk category of rated loans
Loans	240	166
Traditional Banking | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	5,582	7,908
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	182	218
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	510	523
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial Real Estate
Risk category of rated loans
Loans	4,773	7,049
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial & Industrial
Risk category of rated loans
Loans	23	23
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Home equity lines of credit
Risk category of rated loans
Loans	91	94
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Other consumer
Risk category of rated loans
Loans	3	1
Traditional Banking | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,770	2,366
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	1,673	2,267
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Home equity lines of credit
Risk category of rated loans
Loans	97	99
Traditional Banking | Rated Loans
Risk category of rated loans
Loans	1,681,984	1,494,405
Traditional Banking | Rated Loans | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	33,901	36,946
Traditional Banking | Rated Loans | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	2,169	2,294
Traditional Banking | Rated Loans | Commercial Real Estate
Risk category of rated loans
Loans	1,161,225	1,060,496
Traditional Banking | Rated Loans | Construction & land development
Risk category of rated loans
Loans	138,837	119,650
Traditional Banking | Rated Loans | Commercial & Industrial
Risk category of rated loans
Loans	327,214	259,026
Traditional Banking | Rated Loans | Lease Financing Receivables
Risk category of rated loans
Loans	15,367	13,614
Traditional Banking | Rated Loans | Home equity lines of credit
Risk category of rated loans
Loans	2,097	2,212
Traditional Banking | Rated Loans | Consumer: Automobile loan
Risk category of rated loans
Loans	97
Traditional Banking | Rated Loans | Other consumer
Risk category of rated loans
Loans	1,077	167
Warehouse Lending | Warehouse lines of credit
Risk category of rated loans
Loans	571,160	585,439
Warehouse Lending | Pass | Warehouse lines of credit
Risk category of rated loans
Loans	571,160	585,439
Warehouse Lending | Rated Loans | Warehouse lines of credit
Risk category of rated loans
Loans	571,160	585,439
Republic Processing Group
Risk category of rated loans
Loans	47,131	38,947
Republic Processing Group | Commercial & Industrial
Risk category of rated loans
Loans	265	6,695
Republic Processing Group | Republic Credit Solutions
Risk category of rated loans
Loans	46,866	32,252
Republic Processing Group | Pass
Risk category of rated loans
Loans	265	6,695
Republic Processing Group | Pass | Commercial & Industrial
Risk category of rated loans
Loans	265	6,695
Republic Processing Group | Substandard
Risk category of rated loans
Loans	851	82
Republic Processing Group | Substandard | Republic Credit Solutions
Risk category of rated loans
Loans	851	82
Republic Processing Group | Rated Loans
Risk category of rated loans
Loans	1,116	6,777
Republic Processing Group | Rated Loans | Commercial & Industrial
Risk category of rated loans
Loans	265	6,695
Republic Processing Group | Rated Loans | Republic Credit Solutions
Risk category of rated loans
Loans	$ 851	$ 82