STOCK-BASED COMPENSATION - Stock Options Outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified				12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 $12.00 - $12.00	Dec. 31, 2012 $15.00 - $15.00	Dec. 31, 2012 $22.69 - $22.69	Dec. 31, 2012 $26.68 - $26.68	Dec. 31, 2012 $12.00 - $26.68
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Outstanding - Options Outstanding	107	178	240	35	36	18	18	107
Weighted Average Remaining Contractual Life - Options Outstanding				6 years 6 months	6 years 6 months	6 years 6 months	6 years 6 months	6 years 6 months
Weighted Average Exercise Price - Options Outstanding	$ 17.23	$ 17.23	$ 17.23	$ 12.00	$ 15.00	$ 22.69	$ 26.68	$ 17.23
Number of Shares Outstanding - Options Exercisable	77	88		25	26	13	13	77
Weighted Average Exercise Price - Options Exercisable	$ 17.23	$ 17.23		$ 12.00	$ 15.00	$ 22.69	$ 26.68	$ 17.23
Range of exercise prices, Minimum				$ 12.00	$ 15.00	$ 22.69	$ 26.68	$ 12.00
Range of exercise prices, Maximum				$ 12.00	$ 15.00	$ 22.69	$ 26.68	$ 26.68

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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