Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the three months ended March 31, 2012 is presented below:

	Shares			Weighted- Average Grant-Date Fair Value
Nonvested at January 1, 2012		129,082		$	75.00
Granted		55,652		$	119.22
Vested		(58,461	)	$	66.15
Forfeited		(1,061	)	$	108.28
Nonvested at March 31, 2012		125,212		$	98.51