STOCK-BASED COMPENSATION Option Activity (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Range of Per Share Exercise Price
Outstanding, Minimum (dollars per share)	$ 17.17
Outstanding, Maximum (dollars per share)	$ 17.31
Granted, Minimum (dollars per share)	$ 0
Granted, Maximum (dollars per share)	$ 0
Exercised, Minimum (dollars per share)	$ 17.17
Exercised, Maximum (dollars per share)	$ 17.31
Forfeited, Minimum (dollars per share)	$ 0
Forfeited, Maximum (dollars per share)	$ 0
Outstanding, Minimum (dollars per share)	$ 0	$ 17.17
Outstanding, Maximum (dollars per share)	$ 0	$ 17.31
Exercisable, Minimum (dollars per share)	$ 0
Exercisable, Maximum (dollars per share)	$ 0
Shares Under Options
Outstanding (shares)	64,286
Granted (shares)	0
Exercised (shares)	(64,286)
Forfeited (shares)	0
Outstanding (shares)	0	64,286
Weighted Average Exercise Price Per Share
Outstanding (dollars per share)	$ 17.22
Granted (dollars per share)	$ 0.00
Exercised (dollars per share)	$ 17.22
Forfeited (dollars per share)	$ 0.00
Outstanding (dollars per share)	$ 0.00	$ 17.22
Additional Disclosures
Outstanding, Weighted Average Remaining Contractual Term (Years)		2 years 11 months
Outstanding, Aggregate Intrinsic Value	$ 574,000
Outstanding, Aggregate Intrinsic Value	0	574,000
Intrinsic value of stock options exercised	700,000	1,800,000	200,000
Cash received for stock options exercised			500,000
Fair Value of stock options vested	$ 200,000	$ 300,000	$ 600,000
Minimum \| TSR Units
Additional Disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.07%	0.37%	0.38%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	24.14%	33.36%	36.41%
Maximum \| TSR Units
Additional Disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.09%	0.67%	0.40%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	24.22%	36.11%	48.05%

The total fair value of options for which vested during the reporting period

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Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options, Exercisable, Lower Range Limit

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The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The combined weighted average of the accumulated differences between the fair values on underlying shares and exercises prices to acquire such shares as of the grant date on options that were either forfeited or lapsed.

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

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

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

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

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