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Other Investments and Assets - Summary of Other Investments and Assets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Investments, All Other Investments [Abstract]    
Cash surrender value of life insurance $ 19,849 $ 19,690
Workers’ compensation insurance security deposits 3,350 3,350
Other 11,379 11,986
Other investments and assets $ 34,578 $ 35,026