Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation [Abstract]

Schedule Of Option Activity And Changes

Option activity and changes during the year ended December 31, 2015 were as follows:

	Options		Weighted Average Exercise Price		Weighted Average Remaining Term (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2014	1,179,402		$	24.89
Granted	168,369		67.59
Exercised	(32,308	)	32.92
Cancelled	(47,673	)	32.64
Outstanding at December 31, 2015	1,267,790		$	30.07	5.0	$	34,577
Exercisable at December 31, 2015	822,573		$	19.08	4.2	$	29,376

Schedule Of Range Of Exercise Prices For Outstanding Options

For options outstanding at December 31, 2015, the options had the following range of exercise prices:

Range of Prices	Options  Outstanding	Weighted Average Remaining  Contractual Life (Years)
$7.12 - $9.65	304,200	2.7
$10.26 - $18.05	349,906	2.6
$22.92 - $30.05	191,292	5.7
$40.38 - $52.35	107,562	7.3
$63.98 - $68.18	314,830	8.7

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 each option's fair value. Volatility was calculated using historical trends of the Company's common stock price.

	Stock Option Grants
	Year Ended December 31,
	2015			2014			2013
Weighted average fair value	$	20.21		$	20.49		$	17.03
Risk-free interest rate	1.7		%	1.6		%	0.9		%
Expected life in years	5			5			5
Expected volatility	34.2		%	35.7		%	44.5		%
Expected dividend yield	0.9		%	0.7		%	0.6		%

Schedule Of Non-Vested Restricted Stock Award Activity And Changes

Non-vested restricted stock awards as of December 31, 2015 and changes during the year ended December 31, 2015 were as follows:

	Number of Shares		Weighted Average Grant Date Fair Value
Non-vested at December 31, 2014	205,056		$	24.52
Vested	(124,380	)	30.17
Forfeited	(15,820	)	15.81
Non-vested at December 31, 2015	64,856		$	15.81