LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - COMPOSITION OF LOANS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans disclosures
Total loans	$ 4,433,151	$ 4,148,227
Allowance for loan and lease losses	(43,351)	(44,675)	$ (42,769)	$ (32,920)
Loans, net	4,389,800	4,103,552
Core Banking Activities
Loans disclosures
Total loans	4,313,389	4,045,739
Allowance for loan and lease losses	(29,999)	(31,519)	(30,147)	(27,928)
Traditional Banking
Loans disclosures
Total loans	3,595,931	3,577,044
Allowance for loan and lease losses	(28,205)	(30,347)	(28,833)	(26,464)
Republic Processing Group
Loans disclosures
Total loans	119,762	102,488
Allowance for loan and lease losses	(13,352)	(13,156)	(12,622)	(4,992)
Residential Real Estate - Owner Occupied
Loans disclosures
Total loans	949,568	1,001,832
Residential Real Estate - Owner Occupied | Traditional Banking
Loans disclosures
Total loans	949,568	1,001,832
Allowance for loan and lease losses	(4,729)	(6,035)	(6,474)	(7,531)
Residential Real Estate - Non Owner Occupied
Loans disclosures
Total loans	258,803	242,846
Residential Real Estate - Non Owner Occupied | Traditional Banking
Loans disclosures
Total loans	258,803	242,846
Allowance for loan and lease losses	(1,737)	(1,662)	(1,396)	(1,139)
Commercial Real Estate | Traditional Banking
Loans disclosures
Total loans	1,303,000	1,248,940
Allowance for loan and lease losses	(10,486)	(10,030)	(9,043)	(8,078)
Construction & land development | Traditional Banking
Loans disclosures
Total loans	159,702	175,178
Allowance for loan and lease losses	(2,152)	(2,555)	(2,364)	(1,850)
Commercial & industrial | Traditional Banking
Loans disclosures
Total loans	477,236	430,355
Allowance for loan and lease losses	(2,882)	(2,873)	(2,198)	(1,511)
Lease Financing Receivables | Traditional Banking
Loans disclosures
Total loans	14,040	15,031
Allowance for loan and lease losses	(147)	(158)	(174)	(136)
Home equity lines of credit
Loans disclosures
Total loans	293,186	332,548
Home equity lines of credit | Traditional Banking
Loans disclosures
Total loans	293,186	332,548
Allowance for loan and lease losses	(2,721)	(3,477)	(3,754)	(3,757)
Consumer: Credit cards
Loans disclosures
Total loans	17,836	19,095
Consumer: Credit cards | Traditional Banking
Loans disclosures
Total loans	17,836	19,095
Allowance for loan and lease losses	(1,020)	(1,140)	(607)	(490)
Consumer: Overdrafts
Loans disclosures
Total loans	1,522	1,102
Consumer: Overdrafts | Traditional Banking
Loans disclosures
Total loans	1,522	1,102
Allowance for loan and lease losses	(1,169)	(1,102)	(974)	(675)
Consumer: Automobile loan
Loans disclosures
Total loans	52,923	63,475
Consumer: Automobile loan | Traditional Banking
Loans disclosures
Total loans	52,923	63,475
Allowance for loan and lease losses	(612)	(724)	(687)	(526)
Other consumer
Loans disclosures
Total loans	68,115	46,642
Other consumer | Traditional Banking
Loans disclosures
Total loans	68,115	46,642
Allowance for loan and lease losses	(550)	(591)	(1,162)	(771)
Warehouse lines of credit | Warehouse Lending
Loans disclosures
Total loans	717,458	468,695
Allowance for loan and lease losses	(1,794)	(1,172)	(1,314)	(1,464)
Other TRS loans | Republic Processing Group
Loans disclosures
Total loans	14,365	13,744
Allowance for loan and lease losses	(234)	(107)	(12)	(25)
Republic Credit Solutions
Loans disclosures
Total loans	105,397	88,744
Republic Credit Solutions | Republic Processing Group
Loans disclosures
Total loans	105,397	88,744
Allowance for loan and lease losses	$ (13,118)	$ (13,049)	$ (12,610)	$ (4,967)