Condensed Consolidated Statement of Shareholders' Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Unrecognized Gains (Losses) on Derivative Instruments	Pension Obligations	Cumulative Translation Adjustment	Retained Earnings	Non-controlling Interest
Beginning of period at Dec. 31, 2017	$ 445,723	$ 89,755	$ (8,498)	$ (5,257)	$ (75,366)	$ 393,146	$ 51,943
Beginning of the period (in shares) at Dec. 31, 2017	24,917,025	24,917,025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 10,317					10,317
Change in unrecognized gains (losses) on derivative instruments, net of tax	13,910		$ 13,910
Change in employee benefit plans, net of taxes	87			$ 87
Net foreign currency translation adjustment	20,904				$ 20,904
Restricted stock awards granted, net of forfeitures	(330)					$ (330)
Restricted stock awards granted, net of forfeitures (in shares)		67,766
Stock-based compensation expense	$ 129	$ 129
Stock-based compensation expense (in shares)	0	0	0	0	0	0	0
Cash dividends declared ($0.09 per share)	$ (2,250)					$ (2,250)
Redeemable preferred dividend and accretion	(8,069)					(8,069)
Reclassification to Uniwheels non-controlling redeemable equity	(51,943)						$ (51,943)
Adjust Uniwheels non-controlling redeemable equity to redemption value	(3,625)	$ (3,625)
Dividends to Uniwheels non-controlling redeemable equity	(573)					(573)
End of period at Mar. 31, 2018	$ 424,280	$ 86,259	$ 5,412	$ (5,170)	$ (54,462)	$ 392,241
End of the period (in shares) at Mar. 31, 2018	24,984,791	24,984,791