Stock-Based Incentive Plans Stock Options (Details) (USD $)	12 Months Ended
Dec. 31, 2012
STOCK-BASED INCENTIVE PLANS [Abstract]
Outstanding at December 31, 2011	434,000
Exercised	(71,000)
Expired/forfeited	(50,000)
Outstanding at December 31, 2012	313,000
Vested	313,000
Exercisable at December 31, 2012	313,000
Outstanding at December 31, 2011, weighted average exercise price	$ 5.55
Exercised, weighted average exercise price	$ 4.77
Expired/forfeited, weighted average exercise price	$ 4.66
Outstanding at December 31, 2012, weighted average exercise price	$ 5.87
Vested, weighted average exercise price	$ 5.87
Exercisable, weighted average exercise price	$ 5.87
Outstanding at December 31, 2012, weighted average remaining contractual term	1 year 11 months
Vested, weighted average remaining contractual term	1 year 11 months
Exercisable, weighted average remaining contractual term	1 year 11 months
Outstanding at December 31, 2012, aggregate, intrinsic value	$ 6,193,000
Vested, aggregate intrinsic value	6,193,000
Exercisable, aggregate intrinsic value	$ 6,193,000

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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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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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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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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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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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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 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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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

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