Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Contingency [Line Items]
Income tax expense (benefit) for income from continuing operations	$ 17,844	$ (13,768)	$ 43,442	$ 9,831
Unrecognized tax benefit	21,200		21,200
Net tax benefit from unrecognized tax benefits, if recognized	7,100		7,100
Undistributed earnings of foreign subsidiaries	$ 46,000		$ 57,500
Costa Rica | Tax holiday through December 31, 2018
Income Tax Contingency [Line Items]
Holiday tax rate			100.00%
Costa Rica | Tax holiday for the subsequent 4 years
Income Tax Contingency [Line Items]
Holiday tax rate			50.00%
Income tax holiday, term			4 years