CONDENSED PARENT COMPANY ONLY FINANCIAL STATEMENTS - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income:
Interest income	$ 83,213	$ 72,879	$ 60,514
Expenses:
Other expenses	8,650	9,465	8,833
Total noninterest expense	40,000	38,575	31,192
Income tax benefit	(16,150)	(14,667)	(18,153)
Net income	44,718	41,334	31,897
Parent company
Income:
Dividends receive from bank subsidiary	10,402	9,291	5,439
Interest income	48	24	25
Total income	10,450	9,315	5,464
Expenses:
Other expenses	174	96	35
Total noninterest expense	174	96	35
Income before taxes and equity in undistributed income of subsidiary	10,276	9,219	5,429
Income tax benefit	26	29	24
Income before equity in undistributed income of subsidiary	10,302	9,248	5,453
Equity in undistributed income of subsidiary	34,416	32,086	26,444
Net income	$ 44,718	$ 41,334	$ 31,897