Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

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

Following is a summary of the activity of the restricted stock:

	Nine Months Ended
	September 30, 2012
	Shares		Fair Value
Balance at December 31, 2011	52,470		$	29.86
Granted	25,805		$	37.43
Vested	(28,154	)	$	28.02
Balance at September 30, 2012	50,121		$	34.79

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

Following is a summary of the activity of the stock options during the nine-month period ended September 30, 2012:

		Weighted-		Average	Aggregate
		Average		Remaining	Intrinsic
		Exercise		Contractual	Value
	Shares	Price		Term Years	(In thousands)
Outstanding at December 31, 2011	30,628	$	17.79	.84	$	545
Exercised	13,192	$	16.47
Outstanding at September 30, 2012	17,436	$	18.79	.26	$	404
Exercisable at September 30, 2012	17,436	$	18.79	.26	$	404

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Following is a summary of the activity of the non-vested stock options during the nine-month period ended September 30, 2012:

			Weighted- Average
	Shares		Grant Date Fair Value
Non-vested at December 31, 2011	3,674		$	2.69
Vested	(3,674	)	$	2.69
Non-vested at September 30, 2012	—		$	0.00

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

Following is a summary of the activity of the Company’s SARs program for the nine-month period ended September 30, 2012:

			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
			Exercise		Contractual	Value
	Shares		Price		Term Years	(In thousands)
Outstanding at December 31, 2011	332,586		$	26.87	7.42	$	3,166
Granted	83,968		$	36.92
Exercised	(49,344	)	$	24.64
Outstanding at September 30, 2012	367,210		$	29.47	7.39		4,590
Exercisable at September 30, 2012	219,679		$	25.83	6.33		3,545

Schedule Of Share Based Compensation Non Vested Stock Appreciation Rights [Table Text Block]

Following is a summary of the activity of the non-vested SARs during the nine-month period ended September 30, 2012:

			Weighted-Average
	Shares		Grant Date Fair Value
Non-vested at December 31, 2011	144,321		$	29.35
Granted	83,968		$	36.92
Vested	(80,758	)	$	27.49
Non-vested at September 30, 2012	147,531		$	34.89

Schedule Of Per Share Fair Value Of Stock Appreciation Rights [Table Text Block]

Following are the assumptions used to estimate the per-share fair value of SARs granted:

	Nine Months Ended
	September 30,
	2012		2011
Risk-free interest rate	1.38	%	2.70	%
Expected life	7 yrs.		7 yrs.
Expected volatility	29.39	%	27.86	%
Expected dividend yield	1.84	%	1.77	%