STOCK-BASED COMPENSATION Stock options activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement expiration period	10 years
Share-based compensation arrangement award vesting period	5 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average service period	1 year 5 months 14 days
Exercise price fair market value of the underlying stock on the date of grant	100.00%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 742
Share-based compensation arrangement award vesting period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding at January 1, weighted average exercise price per share	$ 11.36	$ 12.64
Granted, weighted average exercise price per share	$ 0.00	$ 5.18
Expired, weighted average exercise price per share	$ 15.29	$ 16.71
Options outstanding at June 30, weighted average exercise price per share	$ 11.32	$ 11.07
Options exercisable at June 30, weighted average exercise price per share	$ 13.94	$ 12.73
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at January 1, number of Options Outstanding	1,396,350	1,548,300
Granted, number of options outstanding	0	400,000
Expired, number of options outstanding	(14,700)	(14,250)
Options outstanding at June 30, number of Options Outstanding	1,381,650	1,934,050
Options exercisable at June 30, number of options outstanding	969,150	1,509,050

Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period After Grant Date

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- Definition

Stock Option Award Exercise Price as a Percentage of the Fair Market Value of a Share of Common Stock

+ References

No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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- Definition

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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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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Weighted average price of options that were either forfeited or expired.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

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- Definition

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.

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- Definition

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

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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