Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Schedule Of Computation Of Earnings Per Share

			Net Income
For the Three Months Ended September 30,		Income		Shares	Earnings per Share
2012
	Earnings	$	20,845	18,960	$	1.10
	Dilutive stock options		-	341
	Nonvested stock awards		-	103
	Diluted earnings	$	20,845	19,404	$	1.07
2011
	Earnings	$	21,887	20,674	$	1.06
	Dilutive stock options		-	293
	Nonvested stock awards		-	88
	Diluted earnings	$	21,887	21,055	$	1.04
			Net Income
For the Nine Months Ended September 30,		Income		Shares	Earnings per Share
2012
	Earnings	$	62,564	18,977	$	3.30
	Dilutive stock options		-	313
	Nonvested stock awards		-	92
	Diluted earnings	$	62,564	19,382	$	3.23
2011
	Earnings	$	60,274	20,934	$	2.88
	Dilutive stock options		-	379
	Nonvested stock awards		-	87
	Diluted earnings	$	60,274	21,400	$	2.82

Changes In Stock Price Impact On Number Of Shares Included In Diluted Earnings Per Share And Issuable Upon Conversion Of Notes

		Shares		Total Treasury	Shares Due	Incremental
		Underlying 1.875%		Method	to the Company	Shares Issued/
	Share	Convertible	Warrant	Incremental	under Notes	Received by the Company
	Price	Notes	Shares	Shares (a)	Hedges	upon Conversion (b)
$	80.73	44,670	-	44,670	(47,786)	(3,116)
$	90.73	299,912	-	299,912	(320,837)	(20,925)
$	100.73	504,477	-	504,477	(539,674)	(35,197)
$	110.73	672,093	120,638	792,731	(718,985)	73,746
$	120.73	811,941	319,805	1,131,746	(868,591)	263,155
$	130.73	930,395	488,502	1,418,897	(995,309)	423,588

a) Represents the number of incremental shares that must be included in the calculation of fully diluted shares under U.S. GAAP.

b) Represents the number of incremental shares to be issued by the Company upon conversion of the 1.875% Convertible Notes, assuming concurrent settlement of the note hedges and warrants.