Long-Term Debt (Details)	9 Months Ended		9 Months Ended					9 Months Ended			9 Months Ended		1 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 STARS [Member] USD ($)	Sep. 30, 2012 Senior Note June 2021 [Member] USD ($)	May 21, 2011 Senior Note June 2021 [Member] USD ($)	May 23, 2011 Credit Agreement [Member] USD ($)	May 23, 2011 Revolving Line of Credit March 2016 [Member] USD ($)	Sep. 30, 2012 Multi Currency Sub Facility [Member] USD ($)	May 23, 2011 Multi Currency Sub Facility [Member] USD ($)	May 23, 2011 Letter Of Credit Sub Facility [Member] USD ($)	Sep. 30, 2012 Term Loan due March 2016 [Member] USD ($)	May 23, 2011 Term Loan due March 2016 [Member] USD ($)	Mar. 31, 2016 Acquisition Notes [Member] Non Interest Bearing Acquisition Note [Member] USD ($)	Mar. 31, 2014 Acquisition Notes [Member] Non Interest Bearing Acquisition Note [Member] USD ($)	Dec. 31, 2011 Acquisition Notes [Member] Non Interest Bearing Acquisition Note [Member] USD ($)	Sep. 30, 2012 Acquisition Notes [Member] Non Interest Bearing Acquisition Note [Member] STARS [Member] USD ($)	Sep. 30, 2011 Acquisition Notes [Member] Non Interest Bearing Acquisition Note [Member] STARS [Member] USD ($)	Sep. 30, 2012 Notes Payable to Banks [Member] Senior Note June 2021 [Member] USD ($)	Dec. 31, 2011 Notes Payable to Banks [Member] Senior Note June 2021 [Member] USD ($)	Sep. 30, 2012 Notes Payable to Banks [Member] Senior Debentures August 2014 [Member] USD ($)	Dec. 31, 2011 Notes Payable to Banks [Member] Senior Debentures August 2014 [Member] USD ($)	Sep. 30, 2012 Notes Payable to Banks [Member] Senior Debentures April 2028 [Member] USD ($)	Dec. 31, 2011 Notes Payable to Banks [Member] Senior Debentures April 2028 [Member] USD ($)	Sep. 30, 2012 Subordinated Debt [Member] Deferrable Interest Subordinated Noted Due April 2012 [Member] USD ($)	Dec. 31, 2011 Subordinated Debt [Member] Deferrable Interest Subordinated Noted Due April 2012 [Member] USD ($)	Sep. 30, 2012 Line of Credit [Member] Revolving Line of Credit March 2016 [Member] USD ($)	Sep. 30, 2012 Line of Credit [Member] Revolving Line of Credit March 2016 [Member] AUD	Dec. 31, 2011 Line of Credit [Member] Revolving Line of Credit March 2016 [Member] USD ($)	Sep. 30, 2012 Bank Loans [Member] Term Loan due March 2016 [Member] USD ($)	Dec. 31, 2011 Bank Loans [Member] Term Loan due March 2016 [Member] USD ($)	Sep. 30, 2012 Notes Payable, Other Payables [Member] Various Interest Rate Loans [Member] USD ($)	Dec. 31, 2011 Notes Payable, Other Payables [Member] Various Interest Rate Loans [Member] USD ($)
Long-Term Debt
Total long-term Debt	$ 794,777,000	$ 908,295,000													$ 13,209,000	$ 8,628,000		$ 393,000,000	$ 400,000,000	$ 1,175,000	$ 1,175,000	$ 59,645,000	$ 59,645,000	$ 0	$ 34,768,000	$ 51,890,000	50,000,000	$ 51,045,000	$ 280,000,000	$ 341,250,000	$ 439,000	$ 7,203,000
Less current portion of long-term debt	320,000	62,268,000
Long-term debt, net of current portion	794,457,000	846,027,000
Debt instrument, amount of installment													5,000,000	5,000,000
Debt instrument, stated interest rate percentage					7.25%													7.25%		5.70%		7.55%		8.50%		6.80%	6.80%		4.00%
Debt instrument, face amount					400,000,000												15,000,000
Repayments of debt				7,000,000				43,800,000			61,300,000
Term facility, maximum borrowing capacity						1,400,000,000	550,000,000		100,000,000	50,000,000		350,000,000
Term facility, length of term											5 years
Accrued interest expense	12,000,000	4,400,000
Write off of deferred debt issuance costs, charged to interest expense	300,000
Payments to acquire interest in joint venture			$ 20,000,000