Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Schedule Of Option Activity And Changes

Option activity and changes during the six months ended June 30, 2012 were as follows:

	Options			Weighted Average Exercise Price		Weighted Average Remaining Term (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2011		1,133,147		$	23.26
Granted		115,340			60.09
Exercised		(223,044	)		20.21
Cancelled		(1,278	)		43.92
Outstanding at June 30, 2012		1,024,165		$	28.05		6.5	$	25,693
Exercisable at June 30, 2012		648,698		$	20.92		5.9	$	20,331

Schedule Of Range Of Exercise Prices For Outstanding Options

For options outstanding at June 30, 2012, the options had the following range of exercise prices:

Range of Prices	Options Outstanding		Weighted Average Remaining Contractual Life (Years)
$14.24—$19.29		368,405		5.7
$20.53—$27.24		235,712		7.0
$30.07—$36.10		210,454		4.6
$45.83—$60.11		209,594		9.2

Schedule Of Weighted Average Value And Assumptions For Fair Value Of Options

The table below presents the weighted average value and assumptions used in determining the fair value for each option granted during the six months ended June 30, 2012 and 2011. Volatility was calculated using historical trends of the Company’s common stock price. There were no options granted during the three months ended June 30, 2012 and 2011.

	Stock Option Grants
	Six Months Ended June 30,
	2012		2011
Weighted average fair value	$	23.39	$	19.22
Risk-free interest rate		1.0%		2.8%
Expected life in years		5		6
Expected volatility		45.7%		41.9%
Expected dividend yield		0.5%		0.5%

Schedule Of Non-Vested Restricted Stock Award Activity And Changes

Non-vested restricted stock awards as of June 30, 2012 and changes during the six months ended June 30, 2012 were as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Non-vested at December 31, 2011		582,013		$	23.43
Granted		68,715			60.11
Vested		(298,763	)		17.53
Forfeited		(2,957	)		30.13
Non-vested at June 30, 2012		349,008		$	35.66