Earnings Per Share (Tables)

12 Months Ended

Sep. 30, 2017

The following table sets forth the computation of basic and diluted earnings per share:


	Year Ended September 30,
	2017			2016			2015
Numerator:
Net income	$	436,826		$	409,331		$	446,163
Net income and dividends attributable to participating restricted shares		(3,517	)		(3,592	)		(4,597	)

Numerator for basic earnings per common share	$	433,309		$	405,739		$	441,566

Undistributed income allocated to participating restricted shares		2,512			2,604			3,539
Undistributed income reallocated to participating restricted shares		(2,488	)		(2,569	)		(3,485	)

Numerator for diluted earnings per common share	$	433,333		$	405,774		$	441,620

Denominator:
Weighted average number of shares outstanding — basic		146,017			149,168			154,423
Weighted average number of participating restricted shares		(1,176	)		(1,309	)		(1,591	)

Weighted average number of common shares — basic		144,841			147,859			152,832

Effect of assumed conversion of 0.5% convertible notes		—			5			14
Effect of dilutive stock options granted		1,414			2,002			2,372

Weighted average number of common shares — diluted		146,255			149,866			155,218

Basic earnings per common share	$	2.99		$	2.74		$	2.89

Diluted earnings per common share	$	2.96		$	2.71		$	2.85