Long-Term Debt, Capital Lease Obligations and Hedging Arrangements Fair Value of Hedging Instruments (Details) (Interest Rate Contract [Member], Designated as Hedging Instrument [Member], Other Long-Term Liabilities [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate hedging agreements	$ 2,359	$ 2,049