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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 |  |  |

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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=35744584&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 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: 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 + Details
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