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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

Stock-based compensation expense under all share-based payment plans—our Employee Stock Purchase Plan, stock option plans, stock-settled stock appreciation rights, and performance-based restricted stock units—included in the results of operations follows:



	Year Ended December 31,
	2012		2011		2010
Compensation expense, all share-based payment plans	$	1,508	$	1,349	$	1,224
Income tax benefit	383		329		292

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

Purchases under the plan, at 85% of the fair market value of the common shares, have been as follows:



	Year Ended December 31,
	2012		2011		2010
Number of employees participating	1,157		1,272		1,230
Shares purchased during the year	136,947		150,253		156,381
Weighted-average per share purchase price paid	$	17.20	$	15.46	$	14.11
Cumulative shares purchased since 1982	8,517,782		8,380,835		8,230,582

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

The following table summarizes the SSARs as of December 31, 2012:



Stock-Settled Stock Appreciation Rights	Number of Rights		Weighted- Average Award Date Value		Weighted- Average Remaining Contractual Life	Unrecognized Compensation Cost		Aggregate Intrinsic Value
Unvested, January 1, 2012	210,188		$	3.47
Granted	105,000		2.70
Forfeited	—		—
Vested	(57,371	)	3.43
Unvested, December 31, 2012	257,817		$	3.17	2.8 years	$	573	$	5,363
Employee SSARs	218,400		$	3.31	2.7 years	$	495	$	4,543
Nonemployee Director SSARs	39,417		$	2.34	3.4 years	$	78	$	820

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The following table summarizes

Performance-Based Restricted Stock Units as of December 31, 2012:



Performance-Based Restricted Stock Units	Number of Stock Units		Weighted- Average Grant Date Value		Weighted- Average Remaining Contractual Life	Unrecognized Compensation Cost		Aggregate Intrinsic Value
Unvested, January 1, 2012	113,908		$	15.15
Granted	23,058		19.41
Forfeited	—		—
Vested	(58,313	)	14.52
Unvested, December 31, 2012	78,653		$	16.87	3.9 years	$	626	$	1,636

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair values of stock-based awards granted were estimated at the dates of grant with the following weighted-average assumptions:



	Year Ended December 31,
	2012		2011		2010
Volatility rate	11.7	%	11.9	%	12.2	%
Risk-free interest rate	1.6	%	2.9	%	3.0	%
Expected dividend yield	1.5	%	1.5	%	1.5	%
Expected life of awards (years)	9.1		8.9		9.4

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes activity under the stock option plans for the year ended December 31, 2012:



Stock Options	Number of Options Outstanding		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Unrecognized Compensation Cost		Aggregate Intrinsic Value
Outstanding, January 1, 2012	1,110,785		$	10.62
Granted	—		—
Exercised	(341,531	)	9.01
Forfeited	(8,000	)	7.91
Outstanding, December 31, 2012	761,254		$	11.38	3.8 years	$	8,660	$	7,174
Exercisable, December 31, 2012	639,654		$	10.44	3.1 years			$	6,630

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Information regarding the stock options outstanding at December 31, 2012 is summarized below:



Stock Options Exercise Price		Number Outstanding	Weighted-Average Remaining Contractual Life	Weighted- Average Exercise Price		Number Exercisable	Weighted- Average Exercise Price
Employee options:
	$6.75	256,087	0.9 years	$	6.75	256,087	$	6.75
11.25		251,433	3.4 years	11.25		251,433	11.25
16.00		131,000	6.8 years	16.00		75,400	16.00
16.60		109,400	7.8 years	16.60		43,400	16.60
		747,920	3.8 years	$	11.32	626,320	$	10.35
Director options:
$12.95 to $16.40		13,334	0.9 years	14.33		13,334	14.33
		761,254	3.8 years	$	11.38	639,654	$	10.44

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ References+ Details

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References+ Details