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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value

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Share Based Compensation Arrangement By Share Based Payment Award Expiration Period

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Share based compensation arrangement by share based payment award, percentage of exercisable and vesting period

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Share-based Compensation Arrangement by Share-based Payments Award, Options And Equity Instruments Other Than Options Vested In Period

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Share-based Compensation Arrangement by Share-based Payments Award, Options And Equity Instruments Other Than Options Vested In Period, Fair Value

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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.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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Number of share instruments newly issued under a share-based compensation plan.

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The number of shares purchased on the open market during the period for issuance to employees under the plan.

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Earnings Per Common Share And Stock Options (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Common Share And Share Awards [Line Items]
Incremental dilutive potential common shares, calculated using treasury stock method			35,090	18,286
Anti-dilutive shares excluded from computation of diluted earnings per share			0	11,500
SARs and options vesting period			1 year
Intrinsic values of options exercised			$ 153,000	$ 118,000
Options and SARs vested			3,900
Fair value of options and SARs vested			64,700
Shares issued in period	3,000	3,000
Weighted-average fair values of stock appreciation rights issued			$ 18.84	$ 15.55
Compensation expense relating to SARs or options vesting			75,000	214,000
Total unrecognized compensation cost related to unvested share-based compensation arrangements granted under stock award plans			$ 24,000
Weighted-average period of unrecognized compensation cost recognition			4 months
Minimum [Member]
Earnings Per Common Share And Share Awards [Line Items]
Annual rate at which stock appreciation rights and options are exercisable and vest			10.00%
SARs and options expiration period			5 years
Maximum [Member]
Earnings Per Common Share And Share Awards [Line Items]
Maximum shares of Company stock to be granted to key employees or directors			500,000
Annual rate at which stock appreciation rights and options are exercisable and vest			20.00%
SARs and options expiration period			10 years