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Accrued Expenses and Other Liabilities - Other Noncurrent Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Summary of other noncurrent liabilities    
Straight-line lease liability $ 2,751 $ 3,111
Asset retirement obligations 1,062 990
Other 1,097 1,465
Total $ 4,910 $ 5,566