Condensed Consolidated Statement of Shareholders' Equity - 9 months ended Sep. 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 loss	(5,687)	0	0	0	(5,687)
Foreign currency translation adjustment	(1,194)	0	0	(1,194)	0
Shares issued under incentive plans, net of shares withheld for tax	2,379	170	2,209	0	0
Stock compensation expense	3,919	0	3,919	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	(13,835)	0	0	0	(13,835)
Ending balance at Sep. 30, 2018	159,057	21,523	292,097	(15,849)	(138,714)
Stockholders' Equity [Roll Forward]
Adoption of ASU 2018-02	$ 0	$ 0	$ 0	$ (315)	$ 315