Stock-based compensation (Tables)

6 Months Ended

Mar. 31, 2015

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

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

stock options/SSARs for the periods presented is as follows:

	Three Months Ended				Six Months Ended
	March 31, 2015				March 31, 2015
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding at beginning of period	650,223		$	18.12	650,233		$	18.12
Granted	—		—		—		—
Exercised	(456	)	12.07		(456	)	12.07
Expired	—		—		—		—
Forfeited	(3,137	)	20.32		(3,147	)	20.32
Outstanding at end of period	646,630		$	18.12	646,630		$	18.12
Exercisable at end of period	491,932		$	18.39	491,932		$	18.39
Vested or expected to vest in the future	646,437		$	18.12	646,437		$	18.12

Schedule of nonvested stock awards activity

Activity relating to stock awards, including the Performance Shares, for the periods presented is as follows:

	Three Months Ended				Six Months Ended
	March 31, 2015				March 31, 2015
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Beginning of period	968,439		$	18.31	746,567		$	15.76
Granted	—		—		390,870		19.07
Vested	(271	)	18.85		(63,078	)	15.90
Forfeited	(14,560	)	19.11		(120,751	)	6.39
End of period	953,608		$	18.29	953,608		$	18.29