Condensed Consolidated Statement of Shareholders' Equity - 6 months ended Jun. 30, 2018 - 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, 2017	$ 93,752	$ 18,547	$ 209,253	$ (14,541)	$ (119,507)
Stockholders' Equity [Roll Forward]
Net income	15,452	0	0	0	15,452
Foreign currency translation adjustment	(1,843)	0	0	(1,843)	0
Shares issued under incentive plans, net of shares withheld for tax	504	77	427	0	0
Stock compensation expense	2,692	0	2,692	0	0
Pension liability, net of tax	201	0	0	201	0
Shares issued in public offering, net of equity issuance costs	79,522	2,806	76,716	0	0
Declared dividends	(9,019)	0	0	0	(9,019)
Ending balance at Jun. 30, 2018	181,261	21,430	289,088	(16,498)	(112,759)
Stockholders' Equity [Roll Forward]
Adoption of ASU 2018-02	$ 0	$ 0	$ 0	$ (315)	$ 315