Long-Term Debt (Details)																	3 Months Ended
	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Mar. 31, 2013 Revolver, varying interest rate, due 2015 USD ($)	Dec. 31, 2012 Revolver, varying interest rate, due 2015 USD ($)	Mar. 31, 2013 Term Loan, varying interest rate, due 2015 USD ($)		Dec. 31, 2012 Term Loan, varying interest rate, due 2015 USD ($)		Mar. 31, 2013 8.125% Senior Notes, due 2018 USD ($)	Dec. 31, 2012 8.125% Senior Notes, due 2018 USD ($)	Mar. 31, 2013 9.25% Senior Notes, due 2019 USD ($)		Dec. 31, 2012 9.25% Senior Notes, due 2019 USD ($)		Mar. 31, 2013 6.250% Senior Notes, due 2020 USD ($)	Dec. 31, 2012 6.250% Senior Notes, due 2020 USD ($)	Apr. 15, 2013 Chinese RMB denominated loans, due 2014 and Other Debt CNY	Mar. 31, 2013 Chinese RMB denominated loans, due 2014 and Other Debt USD ($)	Dec. 31, 2012 Chinese RMB denominated loans, due 2014 and Other Debt USD ($)	Mar. 31, 2013 Capital lease obligations, payable through 2017 USD ($)	Dec. 31, 2012 Capital lease obligations, payable through 2017 USD ($)	Mar. 31, 2013 Senior secured term loan credit facility USD ($)	Dec. 31, 2012 Senior secured term loan credit facility USD ($)	Mar. 31, 2013 Secured senior term loan and revolving credit facility USD ($)	Apr. 19, 2013 Letters of credit USD ($)
Debt Instrument
Long-term debt, outstanding	$ 1,467,742,000	$ 1,468,166,000	$ 0	$ 0	$ 558,115,000	[1]	$ 559,619,000	[1]	$ 250,000,000	$ 250,000,000	$ 346,013,000	[2]	$ 345,909,000	[2]	$ 300,000,000	$ 300,000,000		$ 13,514,000	$ 12,523,000	$ 100,000	$ 115,000
Less: debt payments due within one year	(16,895,000)	(16,458,000)
Long-term debt, net of current installments	(1,450,847,000)	(1,451,708,000)
Long-term debt, gross											350,000,000		350,000,000									558,160,000	559,730,000
Debt instrument, unamortized discount											3,987,000		4,091,000									45,000	111,000
Debt instrument, interest rate, stated percentage									8.125%		9.25%				6.25%
Line of credit facility, maximum borrowing capacity																								250,000,000
Line of credit facility, amount outstanding																						558,160,000
Letters of credit outstanding, amount																						44,303,000
Amount available under credit facility																						205,697,000
Redeemed aggregate principal amount																	50,000,000
Reduction of letter of credit																									$ 6,500,000

[1] Total of $558,160 less amortization of a loan discount in the amount of $45 as of March 31, 2013. Total of $559,730 less amortization of a loan discount in the amount of $111 as of December 31, 2012.

[2] Total of $350,000 less amortization of a loan discount in the amount of $3,987 and $4,091 as of March 31, 2013 and December 31, 2012, respectively.