Property and Equipment, Net - Depreciation Expense Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Depreciation Expense [Line Items]
Depreciation expense	$ 24,870	$ 22,230	$ 21,770
Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	24,870	22,230	21,770
Cost of Sales [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	23,700	20,890	20,110
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 1,170	$ 1,340	$ 1,660