Assets Held for Sale (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jul. 01, 2015
Long Lived Assets Held-for-sale [Line Items]
Asset impairment Charges	$ 0	$ 84,690,000	$ 1,884,000	$ 84,690,000	$ 87,200,000
Assets held for sale	0		$ 0		50,000,000
Cognizant Technology Solutions [Member]
Long Lived Assets Held-for-sale [Line Items]
Term of Contract			7 years
Sale price of assets per asset sale agreement	50,000,000		$ 50,000,000
Property and equipment, net	0		0		50,000,000
Goodwill	0		0		0
Break-up fee under the Restated MSA						$ 10,000,000
Property, Plant and Equipment [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset impairment Charges	0	77,700,000	1,900,000	77,700,000	80,200,000
Property, Plant and Equipment [Member] | Cognizant Technology Solutions [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets classified as held for sale during the year	(50,000,000)		1,900,000		130,200,000
Asset impairment Charges			1,900,000		80,200,000
Goodwill [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset impairment Charges	0	$ 7,000,000	0	$ 7,000,000	7,000,000
Goodwill [Member] | Cognizant Technology Solutions [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets classified as held for sale during the year	0		0		7,000,000
Asset impairment Charges			0		7,000,000
Assets Held-for-sale [Member] | Cognizant Technology Solutions [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets classified as held for sale during the year	$ (50,000,000)		$ 1,900,000		$ 137,200,000