Goodwill (Details) - USD ($)		1 Months Ended	12 Months Ended
	Nov. 01, 2015	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance			$ 336,974,000	$ 338,800,000	$ 338,800,000
Other adjustments					0
Ending balance			334,680,000	336,974,000	$ 338,800,000
Goodwill, gross			517,000,000	519,300,000
Goodwill, impaired, accumulated impairment loss			182,400,000	182,400,000
Navvis Healthcare, LLC [Member]
Goodwill [Roll Forward]
Sale of business				$ (1,826,000)
Proceeds from sale of business	$ 4,400,000
Gain (loss) on sale of business	$ 1,873,000
MeYou Health, LLC [Member]
Goodwill [Roll Forward]
Sale of business			$ (2,294,000)
Proceeds from sale of business		$ 5,500,000
Gain (loss) on sale of business		(4,826,000)
MeYou Health, LLC [Member] | Maximum [Member]
Goodwill [Roll Forward]
Additional contingent consideration received		$ 1,500,000