Long-Term Debt (Details) In Thousands, unless otherwise specified	3 Months Ended								3 Months Ended			6 Months Ended		1 Months Ended
	Jun. 30, 2012 USD ($)	Jun. 30, 2012 CNY	May 02, 2012 CNY	Jun. 30, 2012 7.875% senior subordinated notes due 2016 USD ($)	Jun. 30, 2012 8.125% senior subordinated notes due 2018	Jun. 30, 2012 9.25% senior subordinated notes due 2019 USD ($)	Jun. 30, 2012 Letter of Credit [Member] CNY	Jan. 17, 2012 Letter of Credit [Member] USD ($)	Jun. 30, 2012 China Loans CNY	Mar. 31, 2012 China Loans CNY	Jun. 30, 2012 China Loans USD ($)	Jun. 30, 2012 Credit agreement Federal funds effective rate	Jun. 30, 2012 Credit agreement LIBOR	Feb. 21, 2012 Secured senior term loan and revolving credit facility USD ($)	Jun. 30, 2012 Secured senior term loan and revolving credit facility USD ($)	Jun. 30, 2012 Senior secured revolving credit facility USD ($)	Jun. 30, 2012 Senior secured term loan credit facility USD ($)
Debt Instrument
Debt Instrument, Description of Variable Rate Basis												Federal funds effective rate	One month LIBOR
Line of Credit Facility, Maximum Borrowing Capacity			60,000												$ 250,000
Line of Credit Facility, Amount Outstanding	21,312																562,625
Letters of Credit Outstanding, Amount																37,687
Amount available under credit facility																212,313
Debt Instrument Refinanced Amount														16,400
Debt Instrument, Consent Fees														57
Long-term Debt and Capital Lease Obligations Current and Non-current				200,000		345,714			71,312
Debt Instrument, interest rate, stated percentage				7.875%	8.125%												9.25%
Redeemed aggregate principal amount									166,000	12,500
Reduction of Letter of Credit								1,000			28,200
Short-term Debt		50,000					6,500
Duration of Short Term Loan	1 year	1 year