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Number of stock options or SARs granted where exercise price was less than market price on date of grant.

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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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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 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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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 Share Awards (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Common Share And Share Awards [Line Items]
Incremental dilutive potential common shares, calculated using treasury stock method (in shares)	25,877	34,066	32,929	31,413
Anti-dilutive shares excluded from computation of diluted earnings per share	3,000	0	3,000	5,000
SARs and options vesting period			1 year
Share-settled SARs to directors (in shares)	3,000	3,000
Weighted-average fair values for SARs issued (dollars per share)	$ 27.55	$ 18.84
Compensation expense relating to SARs or options vesting			$ 40	$ 37
Total unrecognized compensation cost related to unvested share-based compensation arrangements granted under stock award plans	$ 67		$ 67
Weighted-average period of unrecognized compensation cost recognition			0 years 4 months
Number of stock options or SARs granted where exercise price was less than market price on date of grant			0
Minimum
Earnings Per Common Share And Share Awards [Line Items]
SARs and options expiration period			5 years
Annual rate at which stock appreciation rights and options are exercisable and vest			10.00%
Maximum
Earnings Per Common Share And Share Awards [Line Items]
Maximum shares of Company stock to be granted to key employees or directors			500,000
SARs and options expiration period			10 years
Annual rate at which stock appreciation rights and options are exercisable and vest			20.00%