Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Commitments [Line Items]
Rent expense	$ 11,400	$ 10,700	$ 8,100
Proceeds from sale-leaseback transactions	0	$ 2,017	5,521
Term of lease		7 years
Deferred credits	2,500	$ 2,700
Property, plant, and equipment grants from Ireland	170	$ 171	$ 175
Irish grants refundable if operations discontinued	$ 3,700
Remaining grant liability period	2 years
Minimum
Other Commitments [Line Items]
Grant period	5 years
Maximum
Other Commitments [Line Items]
Grant period	8 years