Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Deficit [Member]
Beginning balance at Dec. 31, 2019	$ 166,682	$ 21,785	$ 296,363	$ (16,349)	$ (135,117)
Stockholders' Equity [Roll Forward]
Net income	25,094	0	0	0	25,094
Foreign currency translation adjustment	(1,535)	0	0	(1,535)	0
Shares issued under incentive plans, net of shares withheld for tax	(127)	60	(187)	0	0
Stock compensation expense	1,346	0	1,346	0	0
Declared dividends	(9,765)	0	0	0	(9,765)
Ending balance at Jun. 30, 2020	181,695	21,845	297,522	(17,884)	(119,788)
Beginning balance at Mar. 31, 2020	176,223	21,828	296,736	(19,104)	(123,237)
Stockholders' Equity [Roll Forward]
Net income	8,368	0	0	0	8,368
Foreign currency translation adjustment	1,220	0	0	1,220	0
Shares issued under incentive plans, net of shares withheld for tax	110	17	93	0	0
Stock compensation expense	693	0	693	0	0
Declared dividends	(4,919)	0	0	0	(4,919)
Ending balance at Jun. 30, 2020	181,695	21,845	297,522	(17,884)	(119,788)
Beginning balance at Dec. 31, 2020	189,100	21,939	300,852	(15,773)	(117,918)
Stockholders' Equity [Roll Forward]
Net income	18,380	0	0	0	18,380
Foreign currency translation adjustment	881	0	0	881	0
Shares issued under incentive plans, net of shares withheld for tax	1,672	170	1,502	0	0
Stock compensation expense	1,829	0	1,829	0	0
Declared dividends	(9,881)	0	0	0	(9,881)
Ending balance at Jun. 30, 2021	201,981	22,109	304,183	(14,892)	(109,419)
Beginning balance at Mar. 31, 2021	194,253	22,054	303,127	(15,362)	(115,566)
Stockholders' Equity [Roll Forward]
Net income	11,075	0	0	0	11,075
Foreign currency translation adjustment	470	0	0	470	0
Shares issued under incentive plans, net of shares withheld for tax	435	55	380	0	0
Stock compensation expense	676	0	676	0	0
Declared dividends	(4,928)	0	0	0	(4,928)
Ending balance at Jun. 30, 2021	$ 201,981	$ 22,109	$ 304,183	$ (14,892)	$ (109,419)