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Commitments (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Rent expenses under operating leases |  |  |
Rent expenses | $ 4,800,000 | $ 6,800,000 | $ 6,200,000
Future minimum lease payments under operating leases |  |  |
2012 | 4,197,000 |  |
2013 | 3,396,000 |  |
2014 | 3,010,000 |  |
2015 | 2,924,000 |  |
2016 | 2,759,000 |  |
Thereafter | 6,725,000 |  |
Total | $ 23,011,000 |  |

X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease within the fifth year of the balance sheet date relating to leases defined as operating. + References No definition available. + Details
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X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease within the fourth year of the balance sheet date relating to leases defined as operating. + References No definition available. + Details
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X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease within the third year of the balance sheet date relating to leases defined as operating. + References No definition available. + Details
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X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease within the second year of the balance sheet date relating to leases defined as operating. + References No definition available. + Details
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X
- Definition The total of future contractually required payments on leases defined as operating net of amount received under sublease. + References No definition available. + Details
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X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease within one year of the balance sheet date relating to leases defined as operating. + References No definition available. + Details
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X
- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due net of amount received under sublease after the fifth year from the balance sheet date on leases defined as operating. + References No definition available. + Details
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- Details
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- 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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