EQUITY-BASED COMPENSATION (Details) (USD $)	6 Months Ended
Jun. 30, 2012
Restricted Stock Units
Restricted stock activity
Outstanding at the beginning of the period (in shares)	1,157,238
Granted (in shares)	385,650
Vested (in shares)	(211,958)
Outstanding at the end of the period (in shares)	1,330,930
Weighted-Average Grant Date Fair Value
Granted (in dollars per share)	$ 14.68
Stock Options
Stock options activity
Outstanding at the beginning of the period (in shares)	280,425
Forfeited (in shares)	(31,000)
Outstanding at the end of the period (in shares)	249,425
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 27.29
Forfeited (in dollars per share)	$ 26.54
Outstanding at the end of the period (in dollars per share)	$ 27.38
Weighted-Average Remaining Contractual Term (in years)
Options outstanding (in years)	1.13
Intrinsic Value
Options outstanding (in dollars)	$ 0

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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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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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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