Fair Value of Financial Instruments Financial Instruments Carried at Historical Costs (Details) In Thousands, unless otherwise specified	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2014 Revolving credit facility [Member] USD ($)	Dec. 31, 2013 Revolving credit facility [Member] USD ($)	Mar. 31, 2014 United States term loan [Member] USD ($)	Dec. 31, 2013 United States term loan [Member] USD ($)	Mar. 31, 2014 Australian term loan [Member] USD ($)	Mar. 31, 2014 Australian term loan [Member] AUD	Dec. 31, 2013 Australian term loan [Member] USD ($)	Mar. 31, 2014 Amortizing notes component of TEUs [Member] USD ($)	Dec. 31, 2013 Amortizing notes component of TEUs [Member] USD ($)	Mar. 31, 2014 Other debt [Member] USD ($)	Dec. 31, 2013 Other debt [Member] USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	$ 1,579,559	$ 1,624,712	$ 16,302	$ 15,949	$ 1,418,579	$ 1,433,414	$ 106,401	114,800	$ 134,436	$ 19,249	$ 21,878	$ 19,028	$ 19,035
Fair Value	$ 1,576,951	$ 1,621,345	$ 16,305	$ 15,956	$ 1,415,660	$ 1,429,204	$ 106,832		$ 135,491	$ 19,157	$ 21,698	$ 18,997	$ 18,996