Commitments and Contingencies - Activity in Recorded Environmental Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of period	$ 49,569
Expenditures	(4,626)
Accretion of discount	799
Additions and changes in estimates	1,070
Foreign currency translation adjustments and other	(2,007)
Balance at end of period	$ 49,569	$ 44,805
Less amounts reported in Accrued expenses		9,588
Amounts reported in Other noncurrent liabilities		$ 35,217