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Commitments and Contingencies - Capital Leased Assets (Details) - Machinery and Equipment - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Capital Leased Assets [Line Items]    
Machinery and equipment $ 7,514 $ 2,032
Less accumulated depreciation (2,302) (886)
Total capital leases $ 5,212 $ 1,146