Accounts Receivable Accounts Receivable, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 379,092	$ 388,671
Allowance for doubtful accounts	(16,659)	(6,213)
Accounts receivable, net	362,433	382,458
Accounts receivable - trade [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	340,331	339,100
Accounts receivable - grants from outside parties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	13,687	22,997	$ 20,300
Accounts receivable - insurance and other third-party claims [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	25,074	$ 26,574
Australian Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write-off of accounts receivable	8,100
Australian Operations [Member] | Accounts receivable - insurance and other third-party claims [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 6,200