Accounts Receivable Insurance and Third-Party Claims (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 357,118,000		$ 329,208,000
Proceeds received from insurance	1,200,000	10,400,000
Accounts receivable - insurance and other third-party claims
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	36,473,000		31,643,000
North American & European Operations [Member] | Accounts receivable - insurance and other third-party claims
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	21,400,000
Australia Operations [Member] | Accounts receivable - insurance and other third-party claims
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 15,100,000