Accumulated Other Comprehensive Loss - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 528,993	$ 601,974	$ 404,410
Other comprehensive income (loss)	(10,528)	(33,009)	39,531
Balance at end of period	391,411	528,993	601,974
Accumulated Other Comprehensive Income (Loss) Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(69,739)	(36,730)	(76,261)
Other comprehensive income (loss)	(10,528)	(33,009)	39,531
Balance at end of period	(80,267)	(69,739)	(36,730)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(49,108)	(28,585)	(62,704)
Other comprehensive income (loss)	(4,740)	(20,523)	34,119
Balance at end of period	(53,848)	(49,108)	(28,585)
Pension, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(19,115)	(8,145)	(13,557)
Other comprehensive income (loss)	(398)	(10,970)	5,412
Balance at end of period	(19,513)	(19,115)	(8,145)
Derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(1,516)	0	0
Other comprehensive income (loss)	(5,390)	(1,516)	0
Balance at end of period	$ (6,906)	$ (1,516)	$ 0