PARENT COMPANY FINANCIAL INFORMATION - Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income:
Total interest income	$ 45,613	$ 46,338	$ 45,799	$ 41,598	$ 40,444	$ 37,241	$ 37,571	$ 33,273	$ 30,555	$ 25,628	$ 25,037	$ 18,758	$ 179,348	$ 148,529	$ 99,978
Expenses:
Interest on borrowed funds													7,056	6,960	4,306
Income before income taxes and equity in undistributed income of subsidiary													63,068	56,446	27,017
Income tax benefit	$ 3,642	$ 2,993	$ 2,241	$ 1,687	$ 3,353	$ 3,491	$ 3,823	$ 2,034	$ 1,982	$ 1,383	$ 1,419	$ 1,008	10,563	12,701	5,792
Net income													52,505	43,745	21,225
Parent Company [Member]
Income:
Interest and dividends													20	26	11
Dividend income													18,526	50,390	13,889
Other													892	1,062	1,865
Total interest income													19,438	51,478	15,765
Expenses:
Interest on borrowed funds													5,593	4,918	3,454
Legal and professional													1,014	3,401	3,833
Other													4,361	2,418	1,755
Operating Expenses, Total													10,968	10,737	9,042
Income before income taxes and equity in undistributed income of subsidiary													8,470	40,741	6,723
Income tax benefit													2,545	2,291	1,496
Income before equity in undistributed income of Subsidiary													11,015	43,032	8,219
Equity in undistributed income of subsidiary													41,490	713	13,006
Net income													$ 52,505	$ 43,745	$ 21,225