Earnings per Share (Tables)

12 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The following is a reconciliation of the numerator and denominator of the diluted net income per share computations for the periods presented below.

	Year Ended September 30,
(in millions, except share amounts)	2019			2018			2017
Numerator:
Net income	$	85.1		$	55.5		$	6.4
Less: Allocation to participating securities	(1.5		)	(0.9		)	(0.1		)
Net income allocated to common stockholders	$	83.6		$	54.6		$	6.3
Denominator:
Weighted average number of:
Common shares outstanding	18,738,905			18,549,011			18,395,987
Dilutive potential common shares outstanding:
Share-based awards	275,490			385,819			291,367
Diluted shares outstanding	19,014,395			18,934,830			18,687,354