Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent
Beginning balance (in shares) at Dec. 31, 2017		27,572,000
Beginning balance at Dec. 31, 2017	$ 486,104	$ 275	$ 292,494	$ 211,080	$ (17,745)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net loss	(5,983)			(5,983)
Cash dividends declared	(1,955)			(1,955)
Share-based compensation expense (in shares)		87,000
Share-based compensation expense	1,256	$ 1	1,255
Shares issued for option exercises (in shares)		23,000
Shares issued for option exercises	242		242
Restricted shares and performance shares forgiven for taxes and forfeited (in shares)		(16,000)
Restricted shares and performance shares forgiven for taxes and forfeited	(287)		(287)
Change in fair value of interest rate swap, net of tax of $1,104	0
Foreign currency translation gain	5,465				5,465
Ending balance (in shares) at Mar. 31, 2018		27,666,000
Ending balance at Mar. 31, 2018	484,859	$ 276	293,704	203,159	(12,280)
Beginning balance (in shares) at Dec. 31, 2018		42,104,000
Beginning balance at Dec. 31, 2018	418,295	$ 421	511,545	(62,046)	(31,625)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net loss	(18,600)			(18,600)
Cash dividends declared	(2,942)			(2,942)
Share-based compensation expense (in shares)		281,000
Share-based compensation expense	$ 873	$ 3	870
Shares issued for option exercises (in shares)	0
Restricted shares and performance shares forgiven for taxes and forfeited (in shares)		(18,000)
Restricted shares and performance shares forgiven for taxes and forfeited	$ (141)		(141)
Change in fair value of interest rate swap, net of tax of $1,104	(3,856)				(3,856)
Foreign currency translation gain	1,262				1,262
Ending balance (in shares) at Mar. 31, 2019		42,367,000
Ending balance at Mar. 31, 2019	$ 394,909	$ 424	$ 512,274	$ (83,570)	$ (34,219)