Commitments and Contingencies - Other Loss Contingencies (Details) - USD ($)		1 Months Ended	3 Months Ended
	Sep. 12, 2014	Apr. 30, 2013	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Non-cash loss from non-income tax contingencies			$ 4,561,000
Long-term indemnification assets			79,621,000		$ 82,061,000
UAM Brazil
Loss Contingencies [Line Items]
Noncontrolling interest, noncontrolling owners, ownership percent		49.00%
Brazil
Loss Contingencies [Line Items]
Estimate of possible contingency loss			42,000,000
Pending Litigation
Loss Contingencies [Line Items]
Contingent liabilities recorded			$ 31,000,000		29,000,000
Taxes, Other-Than-Income Tax
Loss Contingencies [Line Items]
Loss contingency, statues of limitations			10 years
Taxes, Other-Than-Income Tax And Indemnification Assets
Loss Contingencies [Line Items]
Non-cash loss from non-income tax contingencies				$ 2,121,000
Income Tax Contingencies
Loss Contingencies [Line Items]
Contingent liabilities recorded			$ 62,322,000		64,157,000
Guarantee of Indebtedness of Others | Chile
Loss Contingencies [Line Items]
Loss contingency, noncurrent			37,417,000		28,254,000
Guarantee amount, maximum potential amount of payments			509,000,000		499,000,000
Guarantee Obligations
Loss Contingencies [Line Items]
Percent of shares of company acquired in a business combination, used as a guarantee		49.00%
Other Noncurrent Liabilities | Taxes, Other-Than-Income Tax
Loss Contingencies [Line Items]
Loss contingency, noncurrent			54,026,000		52,880,000
Repayment Guarantee For Loans That Financed A Portion Of The Purchase Price
Loss Contingencies [Line Items]
Percentage of shares as guarantee of payment obligations	75.00%
Repayment Guarantee For Obligations Under The Purchase Agreement For The Seller Notes
Loss Contingencies [Line Items]
Percentage of shares as guarantee of payment obligations	25.00%
Discontinued Operations, Held-for-sale
Loss Contingencies [Line Items]
Long-term indemnification assets			391,000		476,000
Discontinued Operations, Held-for-sale | Brazil
Loss Contingencies [Line Items]
Lease receivable			19,500
Discontinued Operations, Held-for-sale | Pending Litigation
Loss Contingencies [Line Items]
Contingent liabilities recorded			4,100,000		18,000,000
Discontinued Operations, Held-for-sale | Income Tax Contingencies
Loss Contingencies [Line Items]
Contingent liabilities recorded			12,182,000		11,208,000
Discontinued Operations, Held-for-sale | Other Noncurrent Liabilities | Taxes, Other-Than-Income Tax
Loss Contingencies [Line Items]
Loss contingency, noncurrent			$ 4,725,000		$ 4,999,000