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Other Current Liabilities Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Other Liabilities, Current [Abstract]    
Accrued salaries and vacation $ 24,059 $ 23,928
Accrued insurance, primarily current portion of liability for insurance claims 6,702 6,340
Accrued taxes 8,518 7,129
Accrued advertising 4,444 8,027
Gift cards 2,899 4,017
Other 10,499 9,991
Other current liabilities $ 57,121 $ 59,432