Property and Equipment, Net - Depreciation Expense Table (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Depreciation Expense [Line Items]
Depreciation expense			$ 18,890	$ 17,710
Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 5,840	$ 5,730	18,890	17,710
Cost of Sales [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	5,440	5,120	17,380	15,590
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 400	$ 610	$ 1,510	$ 2,120