Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the year ended December 31, 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		(57,636	)	$	47.05
Forfeited		(2,298	)	$	77.95
Nonvested at December 31, 2011		129,082		$	75.00