Commitments and Contingencies Activity in Recorded Environmental Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance, beginning of year	$ 49,569	$ 39,808	$ 34,919
Expenditures	(6,037)	(6,885)	(1,818)
Accretion of discount	1,030	1,283	896
Additions and changes in estimates	1,129	17,039	3,344
Foreign currency translation adjustments and other	(3,099)	(1,676)	2,467
Balance, end of year	$ 49,569	$ 39,808	$ 34,919	$ 42,592	$ 49,569	$ 39,808
Less amounts recorded in Accrued expenses				9,534	9,193	2,290
Amounts reported in Other noncurrent liabilities				$ 33,058	$ 40,376	$ 37,518