CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital And Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings	2012 Equity Plan	2012 Equity Plan Common Stock	2012 Equity Plan Additional Paid-In Capital And Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance (shares) at Dec. 31, 2015		20,886,261
Beginning balance at Dec. 31, 2015	$ 329,564	$ 2	$ 110,435	$ 219,127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	13,979			13,979
Issuance of restricted common stock under the Equity Plan (shares)		23,649				3,961
Issuance of common stock for vested restricted stock units under the 2012 Equity Plan					$ 53		$ 53
Purchased and retired common stock (shares)		(2)
Amortization of stock based compensation	854		854
Cash dividends declared	(15,766)			(15,766)
Common stock repurchase program (shares)		(388,255)
Common stock repurchase program	(6,489)		(6,489)
Other	(108)		(43)	(65)
Ending balance (shares) at Dec. 31, 2016		20,525,614
Ending balance at Dec. 31, 2016	322,087	$ 2	104,810	217,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(15,306)			(15,306)
Issuance of restricted common stock under the Equity Plan (shares)		21,296				143,394
Amortization of stock based compensation	3,688		3,688
Cash dividends declared	(10,332)			(10,332)
Common stock repurchase program (shares)		(572,550)
Common stock repurchase program	(10,023)		(10,023)
Other	159			159
Issuance of common stock under the Employee Stock Purchase Plan (shares)		17,760
Issuance of common stock under the Employee Stock Purchase Plan	256		256
Ending balance (shares) at Dec. 31, 2017		20,135,514
Ending balance at Dec. 31, 2017	290,529	$ 2	98,731	191,796
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,479)			(1,479)
Issuance of restricted common stock under the Equity Plan (shares)		199,991				24,989
Amortization of stock based compensation	4,954		4,954
Cash dividends declared	(10,133)			(10,133)
Common stock repurchase program (shares)		(929,116)
Common stock repurchase program	(13,483)		(13,483)
Issuance of common stock under the Employee Stock Purchase Plan (shares)		20,120
Issuance of common stock under the Employee Stock Purchase Plan	247		247
Estimated tax impact resulting from adoption of ASC 606	(1,726)			(1,726)
Purchase of common stock for tax withholding (shares)		(62,432)
Purchase of common stock for tax withholding	(976)		(976)
Ending balance (shares) at Dec. 31, 2018		19,389,066
Ending balance at Dec. 31, 2018	$ 274,554	$ 2	$ 89,258	$ 185,294