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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]    
Building $ 26,382 $ 22,981
Land 6,683 6,683
Equipment and other 169,903 133,279
Property and equipment, gross 202,968 162,943
Accumulated depreciation (119,334) (96,895)
Property and equipment, net $ 83,634 $ 66,048