CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Non-Controlling Interest	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2016	$ 181,585	$ 142,651	$ 8,417	$ 30,784		$ (267)
Beginning balance, shares at Dec. 31, 2016		12,827,803
Net income	25,528			25,528
Stock-based compensation	779		779
Cash dividend	(5,118)			(5,118)
Stock options exercised, net of expense recognized	2,296	$ 3,066	(770)
Stock options exercised, net of expense recognized, shares		223,334
Issuance of common stock, net of issuance costs	60,210	$ 60,210
Issuance of common stock, net of issuance costs, shares		2,857,756
Other comprehensive (loss) income, net of taxes	(104)					(104)
Reclassification of stranded tax effects from change in tax rates				72		(72)
Ending balance at Dec. 31, 2017	265,176	$ 205,927	8,426	51,266		(443)
Ending balance, shares at Dec. 31, 2017		15,908,893
Net income	36,105			36,105
Stock-based compensation	684		684
Restricted stock awarded, shares		43,425
Cash dividend	(5,753)			(5,753)
Stock options exercised, net of expense recognized	9,629	$ 13,080	(3,451)
Stock options exercised, net of expense recognized, shares		1,035,942
Issuance of common stock for acquisition	69,603	$ 69,603
Issuance of common stock for acquisition, shares		3,011,762
Non-controlling interest	72				$ 72
Other comprehensive (loss) income, net of taxes	(895)					(895)
Ending balance at Dec. 31, 2018	$ 374,621	$ 288,610	5,659	81,618	72	(1,338)
Ending balance, shares at Dec. 31, 2018	20,000,022	20,000,022
Net income	$ 39,209			39,209
Stock-based compensation	689		689
Restricted stock vested		$ 425	(425)
Cash dividend	(8,033)			(8,033)
Stock options exercised, net of expense recognized	$ 2,817	$ 3,802	(985)
Stock options exercised, net of expense recognized, shares	200,629	200,629
Repurchase of common stock	$ (3,190)	$ (2,442)		(748)
Repurchase of common stock,shares	(169,785)	(169,785)
Other comprehensive (loss) income, net of taxes	$ 1,577					1,577
Ending balance at Dec. 31, 2019	$ 407,690	$ 290,395	$ 4,938	$ 112,046	$ 72	$ 239
Ending balance, shares at Dec. 31, 2019	20,030,866	20,030,866