Derivative Financial Instruments Fair Value of Derivative Instrument (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Interest rate swap [Member] | Designated as hedging instrument [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Financial liabilities carried at fair value	$ 1,601,000	$ 3,777,000
Interest rate swap [Member] | Designated as hedging instrument [Member] | Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Financial liabilities carried at fair value	838,000	882,000
Cross-currency swap agreement [Member] | Not Designated as Hedging Instrument [Member] | Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Financial liabilities carried at fair value	0	143,000
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	53,043,000	4,482,000
Financial liabilities carried at fair value	2,439,000	4,802,000
Fair Value, Inputs, Level 2 [Member] | Interest rate swap [Member] | Designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Financial liabilities carried at fair value	2,439,000	4,659,000
Fair Value, Inputs, Level 2 [Member] | Interest rate swap [Member] | Designated as hedging instrument [Member] | Other assets, net [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	36,987,000	4,227,000
Fair Value, Inputs, Level 2 [Member] | Cross-currency swap agreement [Member] | Not Designated as Hedging Instrument [Member] | Prepaid expenses and other [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 16,056,000	$ 255,000