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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Significant Other Observable Inputs (Level 2) | Recurring basis
    
Summarizes the valuation of interest rate swaps and impaired assets    
Interest rate swaps asset $ 322  
Interest rate swaps liability (3,374) (9,916)
Significant Unobservable Inputs (Level 3) | Nonrecurring basis
    
Summarizes the valuation of interest rate swaps and impaired assets    
Impaired long-lived assets 5,475 32,342
Impaired long-lived assets-Discontinued operations 762 3,312
Long-term receivable from the sale of Canadian Operations $ 7,300