LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - RISK CATEGORY (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Risk category of rated loans
Loans	$ 4,052,500	$ 4,014,034
Pass
Risk category of rated loans
Loans	2,269,715	2,241,808
Special Mention
Risk category of rated loans
Loans	23,130	23,813
Substandard
Risk category of rated loans
Loans	24,634	21,202
Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	1,774	1,833
Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,714	1,771
Rated Loans
Risk category of rated loans
Loans	2,320,967	2,290,427
Core Banking Activities
Risk category of rated loans
Loans	3,974,304	3,935,498
Core Banking Activities | Warehouse lines of credit
Risk category of rated loans
Loans	533,959	525,572
Core Banking Activities | Pass
Risk category of rated loans
Loans	2,269,715	2,230,160
Core Banking Activities | Pass | Warehouse lines of credit
Risk category of rated loans
Loans	533,959	525,572
Core Banking Activities | Special Mention
Risk category of rated loans
Loans	23,130	23,813
Core Banking Activities | Substandard
Risk category of rated loans
Loans	23,328	20,136
Core Banking Activities | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	1,774	1,833
Core Banking Activities | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,714	1,771
Core Banking Activities | Rated Loans
Risk category of rated loans
Loans	2,319,661	2,277,713
Core Banking Activities | Rated Loans | Warehouse lines of credit
Risk category of rated loans
Loans	533,959	525,572
Traditional Banking
Risk category of rated loans
Loans	3,440,345	3,409,926
Traditional Banking | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	912,415	921,565
Traditional Banking | Residential Real Estate - Owner Occupied - Correspondent
Risk category of rated loans
Loans	111,263	116,792
Traditional Banking | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	216,095	205,081
Traditional Banking | Commercial Real Estate
Risk category of rated loans
Loans	1,216,592	1,207,293
Traditional Banking | Construction & land development
Risk category of rated loans
Loans	160,391	150,065
Traditional Banking | Commercial & industrial
Risk category of rated loans
Loans	355,316	341,692
Traditional Banking | Lease Financing Receivables
Risk category of rated loans
Loans	15,751	16,580
Traditional Banking | Home equity lines of credit
Risk category of rated loans
Loans	342,217	347,655
Traditional Banking | Consumer: Credit cards
Risk category of rated loans
Loans	16,677	16,078
Traditional Banking | Consumer: Overdrafts
Risk category of rated loans
Loans	791	974
Traditional Banking | Consumer: Automobile loan
Risk category of rated loans
Loans	65,281	65,650
Traditional Banking | Other consumer
Risk category of rated loans
Loans	27,556	20,501
Traditional Banking | Pass
Risk category of rated loans
Loans	1,735,756	1,704,588
Traditional Banking | Pass | Commercial Real Estate
Risk category of rated loans
Loans	1,205,748	1,197,299
Traditional Banking | Pass | Construction & land development
Risk category of rated loans
Loans	159,780	149,332
Traditional Banking | Pass | Commercial & industrial
Risk category of rated loans
Loans	354,477	341,377
Traditional Banking | Pass | Lease Financing Receivables
Risk category of rated loans
Loans	15,751	16,580
Traditional Banking | Special Mention
Risk category of rated loans
Loans	23,130	23,813
Traditional Banking | Special Mention | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	17,690	18,054
Traditional Banking | Special Mention | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	628	635
Traditional Banking | Special Mention | Commercial Real Estate
Risk category of rated loans
Loans	4,743	4,824
Traditional Banking | Special Mention | Commercial & industrial
Risk category of rated loans
Loans	36	267
Traditional Banking | Special Mention | Home equity lines of credit
Risk category of rated loans
Loans	33	33
Traditional Banking | Substandard
Risk category of rated loans
Loans	23,328	20,136
Traditional Banking | Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	12,395	12,056
Traditional Banking | Substandard | Residential Real Estate - Owner Occupied - Correspondent
Risk category of rated loans
Loans	383
Traditional Banking | Substandard | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	2,259	1,240
Traditional Banking | Substandard | Commercial Real Estate
Risk category of rated loans
Loans	4,765	3,798
Traditional Banking | Substandard | Construction & land development
Risk category of rated loans
Loans	611	733
Traditional Banking | Substandard | Commercial & industrial
Risk category of rated loans
Loans	791	21
Traditional Banking | Substandard | Home equity lines of credit
Risk category of rated loans
Loans	1,427	1,609
Traditional Banking | Substandard | Consumer: Automobile loan
Risk category of rated loans
Loans	141	108
Traditional Banking | Substandard | Other consumer
Risk category of rated loans
Loans	556	571
Traditional Banking | Purchased Credit Impaired Loans - Group 1
Risk category of rated loans
Loans	1,774	1,833
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	176	180
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	244	248
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial Real Estate
Risk category of rated loans
Loans	1,336	1,372
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Commercial & industrial
Risk category of rated loans
Loans	12	27
Traditional Banking | Purchased Credit Impaired Loans - Group 1 | Home equity lines of credit
Risk category of rated loans
Loans	6	6
Traditional Banking | Purchased Credit Impaired Loans - Substandard
Risk category of rated loans
Loans	1,714	1,771
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	1,609	1,658
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Home equity lines of credit
Risk category of rated loans
Loans	102	110
Traditional Banking | Purchased Credit Impaired Loans - Substandard | Other consumer
Risk category of rated loans
Loans	3	3
Traditional Banking | Rated Loans
Risk category of rated loans
Loans	1,785,702	1,752,141
Traditional Banking | Rated Loans | Residential Real Estate - Owner Occupied
Risk category of rated loans
Loans	31,870	31,948
Traditional Banking | Rated Loans | Residential Real Estate - Owner Occupied - Correspondent
Risk category of rated loans
Loans	383
Traditional Banking | Rated Loans | Residential Real Estate - Non Owner Occupied
Risk category of rated loans
Loans	3,131	2,123
Traditional Banking | Rated Loans | Commercial Real Estate
Risk category of rated loans
Loans	1,216,592	1,207,293
Traditional Banking | Rated Loans | Construction & land development
Risk category of rated loans
Loans	160,391	150,065
Traditional Banking | Rated Loans | Commercial & industrial
Risk category of rated loans
Loans	355,316	341,692
Traditional Banking | Rated Loans | Lease Financing Receivables
Risk category of rated loans
Loans	15,751	16,580
Traditional Banking | Rated Loans | Home equity lines of credit
Risk category of rated loans
Loans	1,568	1,758
Traditional Banking | Rated Loans | Consumer: Automobile loan
Risk category of rated loans
Loans	141	108
Traditional Banking | Rated Loans | Other consumer
Risk category of rated loans
Loans	559	574
Republic Processing Group
Risk category of rated loans
Loans	78,196	78,536
Republic Processing Group | Easy Advances
Risk category of rated loans
Loans	15,601
Republic Processing Group | Other TRS loans
Risk category of rated loans
Loans	192	11,648
Republic Processing Group | Republic Credit Solutions
Risk category of rated loans
Loans	62,403	66,888
Republic Processing Group | Pass
Risk category of rated loans
Loans		11,648
Republic Processing Group | Pass | Other TRS loans
Risk category of rated loans
Loans		11,648
Republic Processing Group | Substandard
Risk category of rated loans
Loans	1,306	1,066
Republic Processing Group | Substandard | Republic Credit Solutions
Risk category of rated loans
Loans	1,306	1,066
Republic Processing Group | Rated Loans
Risk category of rated loans
Loans	1,306	12,714
Republic Processing Group | Rated Loans | Other TRS loans
Risk category of rated loans
Loans		11,648
Republic Processing Group | Rated Loans | Republic Credit Solutions
Risk category of rated loans
Loans	$ 1,306	$ 1,066