Discontinued Operations (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended
		Jul. 31, 2016 USD ($) $ / shares	May 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Installment	Jun. 30, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Adjustable convertible equity right, face amount		$ 30,000
Conversion period of stock conversion		24 months
Financial results included in losses from discontinued operations [Abstract]
Pretax loss on release of cumulative translation adjustment						$ (3,044)	$ 0
Loss from discontinued operations, net of income tax				$ (3,673)	$ (195,454)	(3,893)	(228,557)
TPHS Business [Member] | Discontinued Operations, Disposed of by Sale [Member]
Financial results included in losses from discontinued operations [Abstract]
Revenues				0	65,546	0	128,751
Cost of services				38	71,230	258	143,722
Selling, general & administrative expenses				20	5,055	157	12,115
Depreciation and amortization				0	10,701	0	21,575
Restructuring and related charges				0	2,722	0	8,424
Distribution from joint venture				98	0	98	0
Pretax income (loss) on discontinued operations				40	(24,162)	(317)	(57,085)
Pretax loss on release of cumulative translation adjustment	[1]			(3,044)	0	(3,044)	0
Pretax loss on sale of TPHS business				(134)	(4,826)	(444)	(4,826)
Pretax loss on impairment of held for sale asset group				0	(158,354)	0	(158,354)
Total pretax loss on discontinued operations				(3,138)	(187,342)	(3,805)	(220,265)
Income tax expense				535	8,112	88	8,292
Loss from discontinued operations, net of income tax				(3,673)	$ (195,454)	(3,893)	(228,557)
Significant operating and investing non-cash items of the discontinued operations [Abstract]
Depreciation and amortization on discontinued operations						0	21,575
Capital expenditures on discontinued operations						0	7,680
Share-based compensation on discontinued operations						$ 0	$ 1,763
Sharecare [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash paid to ShareCare at closing		$ 25,000
Remaining payment obligation responsibility percentage						66.70%
Contractual obligations in respect of purchase price to be paid in connection with Sharecare's acquisition of additional membership interest in Gallup Joint Venture				4,200		$ 4,200
Number of quarterly installments | Installment						5
Payment obligation included in accrued liabilities				1,600		$ 1,600
Sharecare [Member] | Adjustable Convertible Equity Right [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Adjustable convertible equity right, face amount			$ 39,800
Stock issued during period conversion of convertible securities, conversion price (in dollars per share) | $ / shares		$ 249.87
Maximum reduction in face amount of adjustable convertible equity right due to negative cash flows			20,000
Net working capital surplus			9,800
Increase in face value of adjustable convertible equity right (ACER)			9,800
Non-contingent portion of face amount			$ 19,800
Total fair value of adjustable convertible equity right recorded				$ 5,300		$ 5,300

[1] During the second quarter of 2017, we substantially liquidated a foreign entity that was part of our TPHS business, resulting in a release of the cumulative translation adjustment of $3.0 million into loss from discontinued operations.