Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Summary Information For Stock Options

	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (years)
Outstanding at January 1, 2011		1,143,285		$	88.49
Granted		56,916		$	86.90
Exercised		(41,322	)	$	42.55
Terminated		(7,312	)	$	108.01
Outstanding at December 31, 2011		1,151,567		$	89.93		3.7
Exercisable at December 31, 2011		935,594		$	89.36		3.2

Summary Information For Incentive Stock Awards And Restricted Stock Awards

	Incentive Stock					Restricted Stock
	Number of Awards			Weighted- Average Grant-Date Fair Value		Number of Awards			Weighted- Average Grant-Date Fair Value
January 1, 2011		28,692		$	79.24		390,220		$	107.27
Awarded		16,814		$	84.71		46,558		$	86.90
Distributed		(13,806	)	$	81.78		(125,978	)	$	128.01
Forfeited		--		$	--		(5,712	)	$	100.87
December 31, 2011		31,700		$	81.04		305,088		$	95.72

Schedule Of Stock-Based Compensation Expense

(add 000,      except year data)	Stock Options		Restricted Stock Awards		Incentive Compensation Awards		Directors' Awards		Total
Stock-based compensation expense recognized for years ended December 31:
2011	$	2,602	$	7,929	$	272	$	719	$	11,522
2010	$	3,406	$	10,368	$	261	$	640	$	14,675
2009	$	5,828	$	13,722	$	406	$	596	$	20,552
Unrecognized compensation cost at December 31, 2011:	$	1,734	$	5,894	$	215	$	—	$	7,843
Weighted-average period over which unrecognized compensation cost to be recognized:		1.8 years		2.1 years		1.6 years		—

Schedule Of Expected Stock-Based Compensation Expense In Future For Outstanding Awards

(add 000)
2012	$	4,504
2013		2,085
2014		978
2015		276
Total	$	7,843