Represents the equity value of the entity under share-based compensation arrangement.

No definition available.

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- Definition

Represents the number of grants given to employees under share-based compensation arrangement.

+ References

No definition available.

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- Definition

Represents the number of grants surrendered for cancellation by the employee under the share-based compensation arrangement.

+ References

No definition available.

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- Definition

Represents the percentage of diluted equity available under options granted pursuant to share-based compensation arrangement.

+ References

No definition available.

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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

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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

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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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.

+ References

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The estimated amount of dividends to be paid to holders of the underlying shares (expected dividends) over the option's term. Dividends are taken into account because payment of dividends to shareholders reduces the fair value of the underlying shares, and option holders generally do not receive dividends.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Staff Accounting Bulletin (SAB)

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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.

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

-Publisher FASB

-Name Accounting Standards Codification

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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.

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-Topic 718

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 2

-Subparagraph (d)(2)

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

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- Definition

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

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-Name Accounting Standards Codification

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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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.

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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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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.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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

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Period Type:	duration

- Definition

Number of share options (or share units) exercised during the current period.

+ 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 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Tax benefits realized from the exercise of stock options resulting in reductions in the entity's income taxes, which increases net cash provided by operating activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6576910&loc=d3e11283-113907

+ Details

Name:	us-gaap_TaxBenefitFromStockOptionsExercised1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

STOCK-BASED COMPENSATION (Details 2) (USD $)	12 Months Ended
STOCK-BASED COMPENSATION (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009	Dec. 31, 2008 item
Stock options
Unrecognized compensation cost
Unrecognized compensation cost	$ 600,000
Weighted-average period for recognition of unrecognized compensation cost	1 year 10 months 24 days
Stock options, Shares
Outstanding at the beginning of the period (in shares)	1,046,746
Granted (in shares)	150,000
Exercised (in shares)	(96,987)
Expired (in shares)	(27,256)
Outstanding at the end of the period (in shares)	1,072,503	1,046,746
Options exercisable at the end of the period (in shares)	230,073
Stock options, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 9.09
Granted (in dollars per share)	$ 7.43
Exercised (in dollars per share)	$ 7.54
Expired (in dollars per share)	$ 10.35
Outstanding at the end of the period (in dollars per share)	$ 8.97	$ 9.09
Options exercisable at the end of the period (in dollars per share)	$ 12.60
Stock options, Weighted Average Remaining Contractual Term
Outstanding at the end of the period	5 years 8 months 12 days
Options exercisable at the end of the period	3 years 10 months 24 days
Stock options, Aggregate Intrinsic Value
Outstanding at the end of the period	9,819,000
Options exercisable at the end of the period	1,350,000
Stock vested or expected to vest
Weighted-average period	1 year 10 months 24 days
Weighted average fair value (in dollars per share)	$ 7.43
Dividends assumed for Black-Scholes option pricing model	0	0
Weighted average assumptions
Volatility factor (as a percent)	45.00%	44.00%
Risk-free interest rate (as a percent)	2.00%	3.60%
Expected term	7 years	7 years
Dividend yield (as a percent)	0.00%	0.00%
Additional disclosure
Intrinsic value of stock options exercised	345,000	17,000
Cash received from stock option exercised	731,000	21,000
Actual tax benefit realized	144,000	7,000
Stock options \| Chairman and CEO
Stock options, Shares
Granted (in shares)	150,000	153,868
Forfeited (in shares)			(589,850)
Stock options, Weighted Average Exercise Price
Granted (in dollars per share)	$ 7.43	$ 5.89
Stock vested or expected to vest
Vesting period	3 years	3 years
Weighted average fair value (in dollars per share)	$ 3.63	$ 2.60
Weighted average fair value (in dollars per share)	$ 7.43	$ 5.89
Additional disclosure
Number of grants				2
Stock options \| Chairman and CEO \| Grant one and two
Stock options, Shares
Forfeited (in shares)		(589,850)
Stock options, Weighted Average Exercise Price
Granted (in dollars per share)				16.95
Stock vested or expected to vest
Vesting period				5 years
Weighted average fair value (in dollars per share)				4.19
Weighted average fair value (in dollars per share)				16.95
Additional disclosure
Percentage of diluted equity available under options granted				2.50%
Number of grants surrendered by employee			1
Stock options \| Chairman and CEO \| Grant one
Stock options, Shares
Granted (in shares)				589,950
Forfeited (in shares)			(589,850)
Stock options, Weighted Average Exercise Price
Forfeited (in dollars per share)			25.43
Additional disclosure
Equity value of the entity				100,000,000
Stock options \| Chairman and CEO \| Grant two
Stock options, Shares
Granted (in shares)				589,950
Additional disclosure
Equity value of the entity				300,000,000
RSUs
Unrecognized compensation cost
Unrecognized compensation cost	4,600,000
Weighted-average period for recognition of unrecognized compensation cost	2 years
Restricted stock
Unrecognized compensation cost
Unrecognized compensation cost	$ 100,000
Weighted-average period for recognition of unrecognized compensation cost	1 month 6 days
Restricted stock \| Chairman and CEO
Stock vested or expected to vest
Vesting period			4 years