PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net earnings	$ 26,279	$ 20,596	$ 14,439
Adjustments:
Stock based compensation	663	592	355
Net cash provided by operating activities	32,046	28,214	29,669
Cash flows from investing activities
Net cash used in investing activities	(17,740)	(108,734)	(183,807)
Cash flows from financing activities
Sale of common stock	0	0	55,755
Purchase of treasury stock	(10,140)	(4,265)	0
Exercise of stock options	925	327	84
Dividends paid	(8,065)	(7,031)	(5,562)
Net cash provided by financing activities	4,898	60,602	118,023
Net change in cash and cash equivalents	19,204	(19,918)	(36,115)
Cash and cash equivalents at beginning of period	71,510	91,428	127,543
Cash and cash equivalents at end of period	90,714	71,510	91,428
Parent Company
Cash flows from operating activities
Net earnings	26,279	20,596	14,439
Adjustments:
Equity in undistributed subsidiary earnings	(5,097)	(13,378)	(16,780)
Stock based compensation	663	592	355
Change in other assets	85	127	1,270
Change in other liabilities	503	557	1,589
Net cash provided by operating activities	22,433	8,494	873
Cash flows from investing activities
Cash paid in connection with acquisitions	0	(6,423)	0
Investment in Guaranty Bank & Trust	0	0	(15,000)
Net cash used in investing activities	0	(6,423)	(15,000)
Cash flows from financing activities
Proceeds of borrowings	0	0	2,000
Repayments of borrowings	(2,000)	(1,000)	(25,786)
Sale of common stock	0	0	55,755
Purchase of treasury stock	(10,140)	(4,265)	0
Exercise of stock options	925	327	84
Dividends paid	(8,065)	(7,031)	(5,562)
Net cash provided by financing activities	(19,280)	(11,969)	26,491
Net change in cash and cash equivalents	3,153	(9,898)	12,364
Cash and cash equivalents at beginning of period	4,111	14,009	1,645
Cash and cash equivalents at end of period	$ 7,264	$ 4,111	$ 14,009