v2.4.0.6

STOCK-BASED COMPENSATION (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2010	May 17, 2011
Stock-based compensation
Maximum shares of common stock that can be issued under the 2011 plan				1,800,000
Shares available for future grant under the 2011 Plan	1,193,782
Total after-tax share-based compensation cost by type of program
Before-tax share-based compensation expense	$ 9,073,000	$ 6,658,000	$ 3,487,000
Income tax benefit	(2,785,000)	(1,755,000)	(943,000)
After-tax share-based compensation expense	6,288,000	4,903,000	2,544,000
Weighted average recognition period of total unrecognized compensation cost (in years)	1
Total unrecognized compensation cost related to nonvested share-based compensation	8,900,000	6,300,000
Total fair value of shares vested	5,300,000	5,300,000	7,000,000
Restricted and deferred stock units
Total after-tax share-based compensation cost by type of program
Before-tax share-based compensation expense	9,050,000	6,433,000	2,784,000
Stock Options
Total after-tax share-based compensation cost by type of program
Before-tax share-based compensation expense	$ 23,000	$ 225,000	$ 703,000

X

- Definition

The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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- Definition

The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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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.

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- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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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).

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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.

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