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Acquisition (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 0 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Jul. 12, 2013 Platinum Health Services, LLC [Member] | Jul. 12, 2013 Platinum Health Services, LLC [Member] Customer Relationships [Member]
Business Acquisition [Line Items] |  |  |  |
Total purchase consideration |  |  | $ 46,832 |
Cash payments to acquire business | 5,000 | 0 | 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 | $ 21,000
Weighted average useful life of acquired finite-lived intangible assets |  |  |  | 10 years

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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