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RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Defined Contribution Plans) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2006 Minimum | Dec. 31, 2006 Maximum
Defined Contribution Plan |  |  |  |  |
Minimum percentage of eligible compensation that may be invested by all U.S. employees covered under the plan (as a percent) | 1.00% |  |  |  |
Employer match of employee contributions of first 6% of eligible compensation (as a percent) | 35.00% |  |  |  |
Percentage of eligible compensation, matched 35% by employer (as a percent) | 6.00% |  |  |  |
Percentage of base pay as additional annual Company contribution to participants hired after November 1, 1997 (as a percent) | 2.00% |  |  | 4.00% | 10.00%
Annual costs recognized for defined contribution plans | $ 9,405 | $ 8,478 | $ 7,039 |  |

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- Definition Minimum percentage of eligible compensation that may be invested by all U.S. employees who are covered under the 401(k) savings plan. + References No definition available. + Details
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- Definition Represents the first level of employee contributions (percentage of compensation) which are matched by the employer. + References No definition available. + Details
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- Definition Represents the employer matching contribution of the first level of employee contributions. + References No definition available. + Details
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- Definition Represents the employer additional matching contributions to a defined contribution plan for participants employer after certain date. + References No definition available. + Details
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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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