Business Acquisitions (Details) - USD ($) $ in Thousands				3 Months Ended
	Jul. 31, 2015	Jun. 17, 2015	Jan. 23, 2015	Jun. 30, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Less:
Goodwill				$ 56,342	$ 56,342		$ 28,454
Gateway to Provider Access, Inc.
Business acquisition
Purchase price	$ 1,500
Gateway to Provider Access, Inc. | Maximum
Business acquisition
Transaction costs associated with acquisition	100
Gateway to Provider Access, Inc. | Client relationships | Maximum
Less:
Finite-lived intangibles	$ 100
BetterHelp
Business acquisition
Cash paid for acquisition			$ 3,300
Period of earn-out payments (in years)			4 years
Contingent future earn-out payments						$ 2,400
Transaction costs associated with acquisition			$ 100
Identifiable assets acquired and liabilities assumed:
Purchase price			5,749
Less:
Cash			89
Accounts receivable			11
Other assets			4
Accounts payable			(6)
Deferred tax			(666)
Other liabilities			(340)
Goodwill			4,686
BetterHelp | Client relationships
Less:
Finite-lived intangibles			141
BetterHelp | Non-compete agreements
Less:
Finite-lived intangibles			910
BetterHelp | Internal-Use Software
Less:
Finite-lived intangibles			780
BetterHelp | Trademarks
Less:
Finite-lived intangibles			140
BetterHelp | Promissory note
Business acquisition
Issuance of unsecured subordinated promissory note			$ 1,000
Promissory note interest rate (as a percent)			5.00%
StatDoc
Business acquisition
Purchase price		$ 30,100
Cash paid for acquisition		13,300
Equity consideration		$ 16,800
Equity consideration (in shares)		1,051,033
Transaction costs associated with acquisition		$ 300
Identifiable assets acquired and liabilities assumed:
Purchase price		29,991
Less:
Cash		360
Accounts receivable		419
Other assets		70
Accounts payable		(609)
Other liabilities		(701)
Goodwill		23,202
StatDoc | Maximum
Business acquisition
Adjustments for working capital				$ 100
StatDoc | Client relationships
Less:
Finite-lived intangibles		3,220
StatDoc | Non-compete agreements
Less:
Finite-lived intangibles		1,070
StatDoc | Internal-Use Software
Less:
Finite-lived intangibles		$ 2,960