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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 Lease | Dec. 31, 2011 | Dec. 31, 2010
Commitments and Contingencies (Textual) |  |  |
Number of long-term, non-cancelable operating leases | 98 |  |
Rent expense | $ 46.5 | $ 42.2 | $ 32.6

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- Details
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- Definition Number of long-term, non-cancelable operating leases. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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