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COMMITMENTS AND CONTINGENCIES (Details 3) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 sqft | Dec. 31, 2011 | Dec. 31, 2010
COMMITMENTS AND CONTINGENCIES |  |  |
Area of lease (in square feet) | 1,900,000 |  |
Obligation for payments under leases |  |  |
2013 | $ 64,639,000 |  |
2014 | 56,397,000 |  |
2015 | 52,927,000 |  |
2016 | 15,956,000 |  |
2017 | 11,369,000 |  |
Thereafter | 27,816,000 |  |
Total obligations under operating leases and equipment purchases | 229,104,000 |  |
Rent expense |  |  |
Rent expense | $ 57,400,000 | $ 57,400,000 | $ 33,300,000

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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the second fiscal year following the latest fiscal year. + 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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