Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 993,194	$ 991,782
Less accumulated depreciation	(552,799)	(542,583)
Property and equipment, net	440,395	449,199
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,476	7,476
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,506	6,293
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	81,301	82,195
Capitalized software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	874,702	866,398
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23,209	$ 29,420