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SHARE-BASED AWARDS, General Disclosures (Details) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2011 Stock Options [Member] | Dec. 31, 2010 Stock Options [Member] | Dec. 31, 2009 Stock Options [Member] | Jan. 31, 2012 Time-Based Restricted Stock Units [Member] | Jan. 31, 2012 Performance-Based Restricted Stock Units [Member] | Dec. 31, 2011 2007 Plan [Member] | Jan. 28, 2010 2007 Plan [Member] | Dec. 31, 2011 2007 Plan [Member] Discretionary Grant Program [Member] Stock Options [Member] | Dec. 31, 2011 2007 Plan [Member] Stock Issuance Program [Member] Time-Based Restricted Stock Units [Member] | Dec. 31, 2011 2007 Plan [Member] Stock Issuance Program [Member] Performance-Based Restricted Stock Units [Member] | Dec. 31, 2011 2007 Plan [Member] Automatic Grant Program [Member] Restricted Stock Units (RSUs) [Member] | Dec. 31, 2011 Predecessor Plan 1998 Employee Plan [Member] Stock Options [Member] | Dec. 31, 2011 Predecessor Plan 1998 Directors' Plan [Member] Stock Options [Member]
General disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock initially reserved for issuance (in shares) |  |  |  |  |  | 2,215,000 |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  |  |  | 1.9 |  |  |  |  |  |  |
Additional shares approved for issuance (in shares) |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |
Number of separate incentive compensation programs |  |  |  |  |  | 4 |  |  |  |  |  |  |
Number of programs that generally award share-based compensation |  |  |  |  |  | 3 |  |  |  |  |  |  |
Minimum percentage of fair market value allowed for exercise price of stock options granted (in hundredths) |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Vesting period of awards granted (in years) |  |  |  | 3Y | 3Y |  |  | 3Y | 3Y | 3Y | 3Y | 3Y | 3Y
Maximum contractual term (in years) |  |  |  |  |  |  |  | 10Y |  |  |  | 10Y |
Maximum period from date of grant that reload feature may be triggered (in years) |  |  |  |  |  |  |  |  |  |  |  | 5Y |
Description of option price under reload feature |  |  |  |  |  |  |  |  |  |  |  | not less than the greater of the fair market value of the Company's stock on the date of exercise or one and one-half times the original option price |
Number of shares that can be purchased with option award (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 8,000
Weighted-average grant-date fair value (in dollars per share) | $ 8.92 | $ 6.59 | $ 2.79 |  |  |  |  |  |  |  |  |  |

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- Definition The number of additional shares authorized for issuance by the Board of Directors upon adopting an amended and restated Plan. + References No definition available. + Details
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- Definition Description of the option price under a reload feature, when a new stock option is granted for such number of shares as is equal to the number surrendered. + References No definition available. + Details
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- Definition The maximum contractual term (in years) of awards granted. + References No definition available. + Details
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- Definition The maximum period from the date of grant (in years) that a reload feature may be given to the option holder, if an option is exercised within this period and payment is made in shares of the Company's stock. + References No definition available. + Details
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- Definition The minimum percentage of fair market value (defined as the closing market price) that is allowed for the exercise price of stock options granted under the Plan. + References No definition available. + Details
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- Definition The number of shares of common stock that can be purchased using the option award granted on the date of each Annual Meeting of Shareholders to each non-employee Director. + References No definition available. + Details
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- Definition Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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