Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment, by Type [Abstract]
Property and equipment		$ 358,200	$ 269,500
Less accumulated depreciation		(212,100)	(185,200)
Property and equipment, net		146,053	84,328
Depreciation expense		19,800	27,100	$ 35,600
Cognizant Technology Solutions [Member] | Assets Held-for-sale [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Transfers and Changes			(130,200)
Increase (Decrease) in Assets Held-for-sale	$ (50,000)	1,900	137,200
Land [Member]
Property, Plant and Equipment, by Type [Abstract]
Property and equipment		1,700	1,700
Leasehold Improvements [Member]
Property, Plant and Equipment, by Type [Abstract]
Property and equipment		2,400	1,500
Building and Building Improvements [Member]
Property, Plant and Equipment, by Type [Abstract]
Property and equipment		58,200	55,800
Furniture, Equipment and Software [Member]
Property, Plant and Equipment, by Type [Abstract]
Property and equipment		$ 295,900	$ 210,500