Commitments and Contingencies Activity in Recorded Asset Retirement Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance, beginning of year	$ 41,489	$ 40,450
Acquisitions	4,650	0
Additions and changes in estimates	14,734	740
Accretion of discount	2,035	1,500
Liabilities settled	(3,289)	(786)
Foreign currency translation adjustments and other	627	(415)
Balance, end of year	$ 41,489	$ 40,450	$ 60,246	$ 41,489
Less amounts reported in Accrued expenses			4,398	0
Amounts reported in Other noncurrent liabilities			$ 55,848	$ 41,489