Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Roll-Forward of Outstanding Restricted Stock Grants Issued

The following table represents a roll-forward of outstanding restricted stock grants issued pursuant to the 2011 and 2005 Plans and related activity during the year ended December 31, 2012 and the six months ended June 30, 2013:


	Shares			Weighted-Average Grant Date Price per Share
Outstanding restricted stock grants as of December 31, 2011		260,621		$	73.78
Grants issued		107,600			75.64
Grants vested		(46,056	)		75.22
Grants forfeited		(2,177	)		71.37

Outstanding restricted stock grants as of December 31, 2012		319,988		$	74.22

Grants issued		26,000			80.27
Grants vested		(3,849	)		(82.32	)
Grants forfeited		—			—

Total outstanding restricted stock grants as of June 30, 2013		342,139		$	74.59

Expense Recognition of Deferred Compensation

Expense recognition of deferred compensation over the remaining vesting periods is as follows:


Six Months Remaining In
2013	2014		2015		2016		2017		2018		Total
$2,460,209	$	4,762,207	$	3,861,066	$	2,026,538	$	1,193,860	$	157,861	$	14,461,741

Summary of Company's Expenses Attributable to 401(k) Plan

The following table summarizes the Company’s expenses attributable to the plan during the three and six months ended June 30, 2013 and 2012:


	June 30, 2013		June 30, 2012
Three Months Ended	$	284,569	$	264,802
Six Months Ended		564,782		517,721