Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation	$ 82,200	$ 73,700	$ 68,300
Gain on sale of property and equipment	$ 31	$ (24)	$ 13,866