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Subsequent Events (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified |  |  | 0 Months Ended |  | 0 Months Ended
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Jun. 30, 2013 | Dec. 31, 2012 | Jul. 09, 2013 Subsequent Event [Member] | Jul. 12, 2013 Subsequent Event [Member] | Jul. 12, 2013 Platinum Health Services, LLC [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |  |
Cash payments to acquire business, gross |  |  |  |  | $ 3,800
Assumed debt in conjunction with acquisition |  |  |  |  | $ 1,200
Number of shares issued or issuable to acquiree |  |  |  |  | 1,200
Company's common stock par value (dollars per share) | $ 0.01 | $ 0.01 |  | $ 0.01 |
Acquisition price paid per share (dollars per share) |  |  |  |  | $ 24.75
Period used to calculate average price of Company's shares |  |  | 10 days |  |
Average closing price of Company's shares (dollars per share) |  |  | $ 24.81 |  |

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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 liabilities assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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