Stock-based compensation (Tables)

6 Months Ended

Mar. 31, 2013

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

Schedule of assumptions for stock options granted during period

We used the following assumptions for our options granted during the six months ended March 31, 2013:

Expected life of options	5.0 years
Expected volatility	46.15		%
Expected discrete dividends	—
Weighted average risk-free interest rate	0.63		%
Weighted average fair value	$	5.39

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

The following table summarizes stock options and SSARs outstanding as of March 31, 2013, as well as activity during the three and six months then ended:

	Three Months Ended				Six Months Ended
	March 31, 2013				March 31, 2013
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding at beginning of period	581,857		$	33.35	429,965		$	40.80
Granted	—		—		155,565		13.33
Exercised	(105	)	10.80		(105	)	10.80
Expired	(6,000	)	94.25		(7,703	)	96.45
Forfeited	(1,587	)	18.89		(3,557	)	19.90
Outstanding at end of period	574,165		$	32.75	574,165		$	32.75
Exercisable at end of period	295,087		$	49.50	295,087		$	49.50
Vested or expected to vest in the future	573,378		$	32.78	573,378		$	32.78

Schedule of nonvested stock awards activity

Activity relating to nonvested stock awards, including the Performance Shares for the three and six months ended March 31, 2013 is as follows:

	Three Months Ended				Six Months Ended
	March 31, 2013				March 31, 2013
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Beginning of period	381,181		$	18.10	323,335		$	19.61
Granted	717		18.82		93,309		10.32
Vested	—		—		(31,653	)	10.80
Forfeited	(7,145	)	13.25		(10,238	)	14.14
End of period	374,753		$	18.19	374,753		$	18.19