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STOCK-BASED COMPENSATION (Detail Textuals 2) (USD $) | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Tax benefits for compensation expense for restricted stock | $ 3,197,000 | $ 2,172,000
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Total fair value of shares vested | 15,471,000 | 10,695,000
Tax benefits for compensation expense for restricted stock | 3,197,000 | 2,172,000
Unrecognized compensation cost related to non-vested restricted shares | $ 38,539,000 |
Unrecognized compensation cost related to non-vested restricted shares recognized period | 3.7 years |

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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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