Property and Equipment - Detail of Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,709,283	$ 1,147,359
Less accumulated depreciation and amortization	(662,278)	(406,450)
Property and equipment, net	1,047,005	740,909
Depreciation expense	285,800	202,300	$ 118,100
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	224,040	179,232
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	736,176	489,763
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	55,935	47,157
Capitalized website and internal-use software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	236,124	131,182
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	87,221	64,180
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	330,436	235,845
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	39,351	0
Land and Buildings Purchased Accounted For as Business Combination [Member]
Property, Plant and Equipment [Line Items]
Purchase consideration	21,500	159,800
Purchase price allocated to land	20,500	159,300
Purchase price allocated to leases currently in place	$ 1,000	700
Purchase price allocated to net liabilities		$ 200