Credit Facilities (Details) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY	Dec. 31, 2012 Standby Letters of Credit [Member] USD ($)	Aug. 31, 2012 Standby Letters of Credit [Member] USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date		Oct. 01, 2012	Oct. 01, 2012
Line of credit facility, amount terminated	$ 15
Prime rate additional percentage points		1.25%	1.25%
Line of credit interest rate during year		5.25%	5.25%	7.50%
Debt Financing Facility, maximum borrowing capacity		2.0	12.5		2.3
Debt Financing Facility, amount borrowed		1.4	9.0
Debt financing facility, cash required to secure letter of credit				$ 2.3