Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Share Repurchase Plan [Member]	Common Stock [Member]	Common Stock [Member] Share Repurchase Plan [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Share Repurchase Plan [Member]	Retained Income [Member]	Accumulated Other Comprehensive (Loss) Income, Net of Tax [Member]
Beginning Balance at Dec. 31, 2018	$ 181,441				$ 0		$ 182,894	$ (1,453)
Beginning Balance, shares at Dec. 31, 2018			8,356,730
Net income	14,291						14,291
Total other comprehensive income, net of income taxes	3,208							3,208
Exercise of common stock options, value	$ 63				63
Exercise of common stock options, shares	10,000		10,000
Issuance of restricted stock	$ 0		$ 0		0		0	0
Issuance of restricted stock, shares			173,160
Forfeiture of restricted stock, value	0		$ 0		0		0	0
Forfeiture of restricted stock, shares			(268,892)
Repurchase and retirement of common stock, value	(1,023)	$ (8,006)			(1,023)	$ (8,006)
Repurchase and retirement of common stock, shares			(24,849)	(192,576)
Common stock dividends	(6,428)						(6,428)
Stock-based compensation	2,948				2,948
Additional paid-in capital shortfall allocated to retained income					6,018		(6,018)
Ending Balance at Jun. 30, 2019	186,494						184,739	1,755
Ending Balance, shares at Jun. 30, 2019			8,053,573
Beginning Balance at Mar. 31, 2019	187,040				103		186,396	541
Beginning Balance, shares at Mar. 31, 2019			8,359,889
Net income	7,553						7,553
Total other comprehensive income, net of income taxes	1,214							1,214
Exercise of common stock options, value	$ 63				63
Exercise of common stock options, shares	10,000		10,000
Issuance of restricted stock	$ 0		$ 0		0		0	0
Issuance of restricted stock, shares			133,160
Forfeiture of restricted stock, value	0		$ 0		0		0	0
Forfeiture of restricted stock, shares			(264,211)
Repurchase and retirement of common stock, value	(1,005)	(6,668)			(1,005)	(6,668)
Repurchase and retirement of common stock, shares			(24,478)	(160,787)
Common stock dividends	(3,192)						(3,192)
Stock-based compensation	1,489				1,489
Additional paid-in capital shortfall allocated to retained income					6,018		(6,018)
Ending Balance at Jun. 30, 2019	186,494						184,739	1,755
Ending Balance, shares at Jun. 30, 2019			8,053,573
Beginning Balance at Dec. 31, 2019	$ 185,543						183,365	2,178
Beginning Balance, shares at Dec. 31, 2019			7,764,564
Exercise of common stock options, shares	10,000
Ending Balance at Mar. 31, 2020	$ 179,256						179,210	46
Ending Balance, shares at Mar. 31, 2020			7,735,204
Beginning Balance at Dec. 31, 2019	185,543						183,365	2,178
Beginning Balance, shares at Dec. 31, 2019			7,764,564
Net income	9,483						9,483
Total other comprehensive income, net of income taxes	(782)							(782)
Cumulative effect on adoption of credit loss standard	(453)						(453)
Exercise of common stock options, value	$ 63				63
Exercise of common stock options, shares	10,000		10,000
Issuance of restricted stock	$ 0		$ 0		0		0	0
Issuance of restricted stock, shares			190,000
Forfeiture of restricted stock, value	0		$ 0		0		0	0
Forfeiture of restricted stock, shares			(12,358)
Repurchase and retirement of common stock, value	(1,326)	(5,141)			(1,326)	(5,141)
Repurchase and retirement of common stock, shares			(29,473)	(128,685)
Common stock dividends	(6,162)						(6,162)
Stock-based compensation	3,860				3,860
Additional paid-in capital shortfall allocated to retained income					2,544		(2,544)
Ending Balance at Jun. 30, 2020	185,085						183,689	1,396
Ending Balance, shares at Jun. 30, 2020			7,794,048
Beginning Balance at Mar. 31, 2020	179,256						179,210	46
Beginning Balance, shares at Mar. 31, 2020			7,735,204
Net income	8,936						8,936
Total other comprehensive income, net of income taxes	1,350							1,350
Issuance of restricted stock	0		$ 0		0		0	0
Issuance of restricted stock, shares			145,000
Forfeiture of restricted stock, value	0		$ 0		0		0	0
Forfeiture of restricted stock, shares			(5,220)
Repurchase and retirement of common stock, value	(1,309)	$ (2,100)			(1,309)	$ (2,100)
Repurchase and retirement of common stock, shares			(29,102)	(51,834)
Common stock dividends	(3,067)						(3,067)
Stock-based compensation	2,019				2,019
Additional paid-in capital shortfall allocated to retained income					$ 1,390		(1,390)
Ending Balance at Jun. 30, 2020	$ 185,085						$ 183,689	$ 1,396
Ending Balance, shares at Jun. 30, 2020			7,794,048