Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Treasury Shares [Member]	Treasury Shares [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Beginning Balance at Dec. 31, 2019	$ 448,799		$ 448,765	$ 3	$ 3	$ 329,568	$ 329,568	$ 217,266		$ 217,232	$ (105,368)	$ (105,368)	$ 7,330	$ 7,330
Beginning Balance (ASU 2016-13 [Member]) at Dec. 31, 2019		$ (34)							$ (34)
Beginning Balance, Shares at Dec. 31, 2019				28,650,918	28,650,918
Net unrealized change in investments, net of tax	1,512												1,512
Shares tendered for income taxes withholding	(233)					(233)
Shares tendered for income taxes withholding, Shares				(17,500)
Restricted stock vested, Shares				25,000
Stock-based compensation on restricted stock	1,345					1,345
Stock buy-back	(7,986)										(7,986)
Stock buy-back, Shares				(766,900)
Cash dividends declared	(1,726)							(1,726)
Net (loss) income	7,620							7,620
Ending balance at Mar. 31, 2020	449,297			$ 3		330,680		223,126			(113,354)		8,842
Ending balance, Shares at Mar. 31, 2020				27,891,518
Beginning Balance at Dec. 31, 2020	442,344			$ 3		331,867		219,782			(115,365)		6,057
Beginning Balance, Shares at Dec. 31, 2020				27,748,606
Net unrealized change in investments, net of tax	(8,202)												(8,202)
Shares tendered for income taxes withholding	(127)					(127)
Shares tendered for income taxes withholding, Shares				(12,500)
Restricted stock vested, Shares				25,000
Issued restricted stock, Shares				143,817
Stock-based compensation on restricted stock	$ 260					260
Stock buy-back, Shares	0
Cash dividends declared	$ (1,679)							(1,679)
Net (loss) income	(5,148)							(5,148)
Ending balance at Mar. 31, 2021	$ 427,448			$ 3		$ 332,000		$ 212,955			$ (115,365)		$ (2,145)
Ending balance, Shares at Mar. 31, 2021				27,904,923