Acquisition (Narrative) (Details) (Platinum Health Services, LLC [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Mar. 31, 2014	Jul. 12, 2013
Business Acquisition [Line Items]
Total purchase consideration		$ 46,832
Cash payments to acquire business		5,000
Equity interest issued to acquiree (number of shares)		1,215
Equity interest issued to acquiree (fair value)		30,062
Contingent consideration, fair value	11,770
Acquired finite-lived intangible assets		21,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible assets		$ 21,000
Weighted average useful life of acquired finite-lived intangible assets		10 years