Acquisition - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
	Jul. 12, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Cash paid for acquisition		$ 0	$ 0	$ 5,000
Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of acquired finite-lived intangible assets		8 years
Platinum Health Services, LLC
Business Acquisition [Line Items]
Total purchase consideration	$ 50,766
Cash paid for acquisition	$ 5,000
Equity interest issued to acquiree (in shares)	1,215
Equity interest issued to acquiree (fair value)	$ 30,062
Contingent consideration (fair value)			$ 15,704
Acquired finite-lived intangible assets	21,300
Platinum Health Services, LLC | Customer Relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets	$ 21,300
Weighted average useful life of acquired finite-lived intangible assets	10 years
Platinum Health Services, LLC | Total Contingent Consideration
Business Acquisition [Line Items]
Equity interest issued to acquiree (in shares)	1,005