LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - RISK CATEGORY (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Risk category of rated loans
Loans	$ 3,916,320	$ 3,810,778
Pass
Risk category of rated loans
Loans	2,152,575	2,024,233
Special Mention
Risk category of rated loans
Loans	28,134	30,702
Substandard
Risk category of rated loans
Loans	21,549	21,412
Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	7,737	7,908
Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,836	2,366
Rated Loans
Risk category of rated loans
Loans	2,211,831	2,086,621
Core Banking Activities
Risk category of rated loans
Loans	3,874,210	3,771,831
Core Banking Activities | Pass
Risk category of rated loans
Loans	2,152,575	2,017,538
Core Banking Activities | Special Mention
Risk category of rated loans
Loans	28,134	30,702
Core Banking Activities | Substandard
Risk category of rated loans
Loans	21,247	21,330
Core Banking Activities | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	7,737	7,908
Core Banking Activities | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,836	2,366
Core Banking Activities | Rated Loans
Risk category of rated loans
Loans	2,211,529	2,079,844
Traditional Banking
Risk category of rated loans
Loans	3,273,580	3,186,392
Traditional Banking | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	961,405	1,000,148
Traditional Banking | Residential Real Estate - Owner Occupied - Correspondent
Risk category of rated loans
Loans	129,792	149,028
Traditional Banking | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	172,684	156,605
Traditional Banking | Commercial Real Estate
Risk category of rated loans
Loans	1,104,026	1,060,496
Traditional Banking | Construction & land development
Risk category of rated loans
Loans	137,877	119,650
Traditional Banking | Commercial & Industrial
Risk category of rated loans
Loans	314,433	259,026
Traditional Banking | Lease Financing Receivables
Risk category of rated loans
Loans	14,371	13,614
Traditional Banking | Home equity lines of credit
Risk category of rated loans
Loans	344,946	341,285
Traditional Banking | Consumer: Credit cards
Risk category of rated loans
Loans	17,879	13,414
Traditional Banking | Consumer: Overdrafts
Risk category of rated loans
Loans	902	803
Traditional Banking | Consumer: Automobile loan
Risk category of rated loans
Loans	59,921	52,579
Traditional Banking | Other consumer
Risk category of rated loans
Loans	15,344	19,744
Traditional Banking | Pass
Risk category of rated loans
Loans	1,551,945	1,432,099
Traditional Banking | Pass | Commercial Real Estate
Risk category of rated loans
Loans	1,087,153	1,042,137
Traditional Banking | Pass | Construction & land development
Risk category of rated loans
Loans	137,128	118,769
Traditional Banking | Pass | Commercial & Industrial
Risk category of rated loans
Loans	313,293	257,579
Traditional Banking | Pass | Lease Financing Receivables
Risk category of rated loans
Loans	14,371	13,614
Traditional Banking | Special Mention
Risk category of rated loans
Loans	28,134	30,702
Traditional Banking | Special Mention | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	20,553	21,344
Traditional Banking | Special Mention | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	869	656
Traditional Banking | Special Mention | Commercial Real Estate
Risk category of rated loans
Loans	5,960	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	669	1,270
Traditional Banking | Special Mention | Home equity lines of credit
Risk category of rated loans
Loans	83	256
Traditional Banking | Substandard
Risk category of rated loans
Loans	21,247	21,330
Traditional Banking | Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	12,642	13,117
Traditional Banking | Substandard | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	1,058	1,115
Traditional Banking | Substandard | Commercial Real Estate
Risk category of rated loans
Loans	3,984	4,224
Traditional Banking | Substandard | Construction & land development
Risk category of rated loans
Loans	749	791
Traditional Banking | Substandard | Commercial & Industrial
Risk category of rated loans
Loans	449	154
Traditional Banking | Substandard | Home equity lines of credit
Risk category of rated loans
Loans	2,158	1,763
Traditional Banking | Substandard | Consumer: Automobile loan
Risk category of rated loans
Loans	99
Traditional Banking | Substandard | Other consumer
Risk category of rated loans
Loans	108	166
Traditional Banking | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	7,737	7,908
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	181	218
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	513	523
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial Real Estate
Risk category of rated loans
Loans	6,929	7,049
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial & Industrial
Risk category of rated loans
Loans	22	23
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Home equity lines of credit
Risk category of rated loans
Loans	92	94
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Other consumer
Risk category of rated loans
Loans		1
Traditional Banking | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,836	2,366
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	1,741	2,267
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Home equity lines of credit
Risk category of rated loans
Loans	95	99
Traditional Banking | Rated Loans
Risk category of rated loans
Loans	1,610,899	1,494,405
Traditional Banking | Rated Loans | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	35,117	36,946
Traditional Banking | Rated Loans | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	2,440	2,294
Traditional Banking | Rated Loans | Commercial Real Estate
Risk category of rated loans
Loans	1,104,026	1,060,496
Traditional Banking | Rated Loans | Construction & land development
Risk category of rated loans
Loans	137,877	119,650
Traditional Banking | Rated Loans | Commercial & Industrial
Risk category of rated loans
Loans	314,433	259,026
Traditional Banking | Rated Loans | Lease Financing Receivables
Risk category of rated loans
Loans	14,371	13,614
Traditional Banking | Rated Loans | Home equity lines of credit
Risk category of rated loans
Loans	2,428	2,212
Traditional Banking | Rated Loans | Consumer: Automobile loan
Risk category of rated loans
Loans	99
Traditional Banking | Rated Loans | Other consumer
Risk category of rated loans
Loans	108	167
Warehouse Lending | Warehouse lines of credit
Risk category of rated loans
Loans	600,630	585,439
Warehouse Lending | Pass | Warehouse lines of credit
Risk category of rated loans
Loans	600,630	585,439
Warehouse Lending | Rated Loans | Warehouse lines of credit
Risk category of rated loans
Loans	600,630	585,439
Republic Processing Group
Risk category of rated loans
Loans	42,110	38,947
Republic Processing Group | Commercial & Industrial
Risk category of rated loans
Loans		6,695
Republic Processing Group | Republic Credit Solutions
Risk category of rated loans
Loans	42,110	32,252
Republic Processing Group | Pass
Risk category of rated loans
Loans		6,695
Republic Processing Group | Pass | Commercial & Industrial
Risk category of rated loans
Loans		6,695
Republic Processing Group | Substandard
Risk category of rated loans
Loans	302	82
Republic Processing Group | Substandard | Republic Credit Solutions
Risk category of rated loans
Loans	302	82
Republic Processing Group | Rated Loans
Risk category of rated loans
Loans	302	6,777
Republic Processing Group | Rated Loans | Commercial & Industrial
Risk category of rated loans
Loans		6,695
Republic Processing Group | Rated Loans | Republic Credit Solutions
Risk category of rated loans
Loans	$ 302	$ 82