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Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred Acquisition Consideration, Fixed Payments | $ 1,231 | $ 1,651
Business Acquisition, Contingent Consideration Potential Cash Payment, Total | $ 198,213 | $ 196,446
6.75% Notes [Member] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% |
11% Notes [Member] |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 11.00%

X
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Balance Type: | credit
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- Definition The additional amount paid towards Deferred acquisition consideration. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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