Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2011

Summary of Stock Option Activity and Related Information

A summary of stock option activity and related information for the nine months ended September 30, 2011 is presented below:

	Options			Weighted- Average Exercise Price		Aggregate Intrinsic Value
Outstanding at January 1, 2011		5,900		$	22.04
Granted		—			—
Exercised		(3,475	)	$	21.83
Forfeited		—			—
Outstanding at September 30, 2011		2,425		$	22.35	$	194
Exercisable at September 30, 2011		2,425		$	22.35	$	194

Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the nine months ended September 30, 2011 is presented below:

	Shares			Weighted- Average Grant-Date Fair Value
Nonvested at January 1, 2011		134,276		$	51.20
Granted		54,740		$	104.07
Vested		(53,321	)	$	47.01
Forfeited		(2,006	)	$	75.91
Nonvested at September 30, 2011		133,689		$	74.15