Acquisition (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		0 Months Ended				0 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Platinum Health Services, LLC [Member]	Jul. 12, 2013 Platinum Health Services, LLC [Member]	Sep. 30, 2014 Platinum Health Services, LLC [Member]	Jul. 12, 2013 Platinum Health Services, LLC [Member]	Jul. 12, 2013 Platinum Health Services, LLC [Member] Customer Relationships [Member]	Jul. 12, 2013 Platinum Health Services, LLC [Member] Customer Relationships [Member]	Sep. 30, 2014 Platinum Health Services, LLC [Member] Contingent Consideration, Shares Not Issued [Member]	Sep. 30, 2014 Platinum Health Services, LLC [Member] Contingent Consideration, Shares Issued [Member]	Jul. 12, 2013 Platinum Health Services, LLC [Member] Contingent Consideration, Total Shares [Member]
Business Acquisition [Line Items]
Total purchase consideration				$ 50,766
Cash payments to acquire business	0	5,000		5,000
Equity interest issued to acquiree (number of shares)				1,215					705	300	1,005
Equity interest issued to acquiree (fair value)						30,062
Contingent consideration, fair value			15,704
Acquired finite-lived intangible assets					$ 21,300	$ 21,000		$ 21,300
Weighted average useful life of acquired finite-lived intangible assets							10 years