Stock-based compensation (Tables)

3 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs

A summary of the expense related to stock-based compensation by award type is as follows for the periods presented:

	Three Months Ended December 31, 2015
(In millions)	2015			2014
Stock options expense	$	0.2		$	0.2
Restricted stock awards expense	1.6			1.2
Before tax stock-based compensation expense	1.8			1.4
Tax benefit	(0.6		)	(0.3		)
After tax stock-based compensation expense	$	1.2		$	1.1

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

We used the following assumptions for stock options granted, which derived the fair value shown, for the period presented:

	Three Months Ended
	December 31, 2015
Expected life of options	4.3 years
Expected volatility	45.23		%
Expected dividends	—
Weighted average risk-free interest rate	1.70		%
Weighted average fair value	$	5.48

Schedule of stock options and SSARs outstanding, as well as related activity

Activity related to stock options for the period presented is as follows:

	Three Months Ended
	December 31, 2015
	Shares	Weighted Average Exercise Price
Outstanding at beginning of period	643,907	$	18.13
Granted	40,600	14.24
Outstanding at end of period	684,507	$	17.90
Exercisable at end of period	591,844	$	18.04
Vested or expected to vest in the future	684,477	$	17.90

Schedule of nonvested stock awards activity

Activity relating to all restricted stock awards is as follows for the periods presented:

	Three Months Ended
	December 31, 2015
	Shares		Weighted Average Grant Date Fair Value
Beginning of period	956,283		$	18.27
Granted	481,976		14.81
Vested	(114,253	)	18.79
Forfeited	(35,532	)	5.73
End of period	1,288,474		$	17.28