Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Adoption of new accounting standards			$ (60)		$ (60)
Beginning balance, adjusted	$ 5	$ 180,109	(36,299)	$ (1)	143,814
Beginning balance at Dec. 31, 2017	$ 5	180,109	(36,239)	(1)	143,874
Beginning balance (in shares) at Dec. 31, 2017	52,156,850
Issuance of restricted shares (in shares)	595,125
Cancellation of restricted shares (in shares)	(73,391)
Stock based compensation		1,950			1,950
Tax withholdings related to net share settlements of stock-based compensation awards		(52)			(52)
Dividends paid		(7,800)			(7,800)
Foreign currency translation adjustments				(44)	(44)
Net income			11,522		11,522
Balance at Sep. 30, 2018	$ 5	174,207	(24,777)	(45)	149,390
Balance (in shares) at Sep. 30, 2018	52,678,584
Beginning balance at Jun. 30, 2018	$ 5	176,124	(27,331)	(8)	148,790
Beginning balance (in shares) at Jun. 30, 2018	52,508,090
Issuance of restricted shares	199,843
Cancellation of restricted shares (in shares)	(29,349)
Stock based compensation		735			735
Tax withholdings related to net share settlements of stock-based compensation awards		(52)			(52)
Dividends paid		(2,600)			(2,600)
Foreign currency translation adjustments				(37)	(37)
Net income			2,553		2,553
Balance at Sep. 30, 2018	$ 5	174,207	(24,777)	(45)	149,390
Balance (in shares) at Sep. 30, 2018	52,678,584
Adoption of new accounting standards			4,802		4,802
Beginning balance, adjusted	$ 5	172,255	(21,055)	(56)	151,149
Beginning balance at Dec. 31, 2018	$ 5	172,255	(25,857)	(56)	$ 146,347
Beginning balance (in shares) at Dec. 31, 2018	52,707,879				52,707,879
Issuance of restricted shares (in shares)	666,753
Cancellation of restricted shares (in shares)	(255,555)
Repurchase of common stock		(10,455)			$ (10,455)
Repurchase of common stock (in shares)	(2,307,023)				(2,307,023)
Stock based compensation		2,169			$ 2,169
Tax withholdings related to net share settlements of stock-based compensation awards		(226)			(226)
Dividends paid		(7,706)			(7,706)
Foreign currency translation adjustments				(35)	(35)
Net income			(217)		(217)
Balance at Sep. 30, 2019	$ 5	156,037	(21,272)	(91)	$ 134,679
Balance (in shares) at Sep. 30, 2019	50,812,054				50,812,054
Beginning balance at Jun. 30, 2019	$ 5	157,961	(19,889)	(54)	$ 138,023
Beginning balance (in shares) at Jun. 30, 2019	50,615,489
Issuance of restricted shares (in shares)	309,305
Cancellation of restricted shares (in shares)	(112,740)
Stock based compensation		660			660
Tax withholdings related to net share settlements of stock-based compensation awards		(90)			(90)
Dividends paid		(2,494)			(2,494)
Foreign currency translation adjustments				(37)	(37)
Net income			(1,383)		(1,383)
Balance at Sep. 30, 2019	$ 5	$ 156,037	$ (21,272)	$ (91)	$ 134,679
Balance (in shares) at Sep. 30, 2019	50,812,054				50,812,054