Derivative Instruments (Fair Value of Derivative Instruments) (Details) (Designated as Hedging Instrument [Member], USD $)				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Interest Rate Swap [Member]	Dec. 31, 2012 Interest rate swap - Fixed pay rate 3.795% [Member]	Dec. 31, 2012 Interest rate swap - Fixed pay rate 3.50% [Member]	Dec. 31, 2012 Interest rate swap - Fixed pay rate 5.45% [Member]	Dec. 31, 2012 Interest rate contract [Member] Other accrued liabilities [Member]	Dec. 31, 2011 Interest rate contract [Member] Other accrued liabilities [Member]	Dec. 31, 2012 Interest rate contract [Member] Other Long-Term Liabilities [Member]	Dec. 31, 2011 Interest rate contract [Member] Other Long-Term Liabilities [Member]	Dec. 31, 2012 Foreign currency contracts [Member] Other accrued liabilities [Member]	Dec. 31, 2011 Foreign currency contracts [Member] Other accrued liabilities [Member]	Dec. 31, 2012 Foreign currency contracts [Member] Other Long-Term Liabilities [Member]	Dec. 31, 2011 Foreign currency contracts [Member] Other Long-Term Liabilities [Member]	Dec. 31, 2012 Forward Contracts [Member]
Derivative instruments - risk management [Abstract]
Notional amount			$ 200,000,000	$ 50,000,000	$ 50,000,000	$ 100,000,000									$ 469,000
Effective date				May 31, 2009	Nov. 30, 2008	Mar. 31, 2006
Termination date				Feb. 28, 2013	Feb. 28, 2013	Feb. 28, 2013
Fixed pay rate (in hundredths)				3.795%	3.50%	5.45%
Receive rate				Three-month LIBOR	Three-month LIBOR	Three-month LIBOR
Derivative Instruments in Hedges, at Fair Value [Abstract]
Fair value, liability derivatives							1,486,000	0	0	9,202,000	0	363,000	39,000	32,000
Total derivatives designated as hedging instruments under ASC 815	1,525,000	9,597,000
Total liability derivatives	$ 1,525,000	$ 9,597,000