SHARE-BASED COMPENSATION (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Restricted Stock Units
Award activity
Outstanding at the beginning of the period (in shares)	1,443,460
Granted (in shares)	208,100
Vested (in shares)	(214,551)
Forfeited (in shares)	(33,548)
Outstanding at the end of the period (in shares)	1,403,461
Weighted-Average Grant Date Fair Value
Granted (in dollars per share)	$ 40.13
Stock Options
Stock options activity
Outstanding at the beginning of the period (in shares)	35,730
Exercised (in shares)	(35,530)
Forfeited (in shares)	(200)
Outstanding at the end of the period (in shares)	0
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 29.10
Exercised (in dollars per share)	$ 29.10
Forfeited (in dollars per share)	$ 29.10
Additional activity related to Company's stock option program
Weighted-Average Remaining Contractual Term, Outstanding	0 years
Intrinsic Value, Outstanding (in dollars)	$ 0
SARs
Award activity
Granted (in shares)	0

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

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-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 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 that were terminated.

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

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