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EMPLOYEE BENEFIT PLANS (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
401(k) plans |  |  |
Employer's matching contribution (as a percent) | 60.00% |  |
Maximum contribution by employer as a percentage of employee's compensation | 5.00% |  |
Employer's matching contribution before change (as a percent) | 50.00% |  |
Vesting period of employer's contributions | 3 years |  |
Contributions by employer | $ 551 | $ 438 | $ 1,065
Nonqualified deferred compensation plan |  |  |
Maximum percentage of annual salary and bonus that may be deferred | 100.00% |  |
Period for payment of obligation upon separation, one | 3 years |  |
Period for payment of obligation upon separation, two | 5 years |  |
Deferred compensation plan assets | $ 1,276 | $ 1,429 |

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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + 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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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