Stock-based compensation (Tables)

3 Months Ended

Dec. 31, 2013

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

Schedule of assumptions for stock options granted during period

We used the following weighted-average assumptions for our options granted during the three months ended December 31, 2013:

Expected life of options	5.1 years
Expected volatility	45.99		%
Expected discrete dividends	—
Weighted average risk-free interest rate	1.42		%
Weighted average fair value	$	7.97

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

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

	Three Months Ended
	December 31, 2013
	Shares		Weighted- Average Exercise Price
Outstanding at beginning of period	560,784		$	33.01
Granted	161,010		19.11
Exercised	(106	)	10.80
Forfeited	(561	)	15.23
Outstanding at end of period	721,127		$	29.92
Exercisable at end of period	416,917		$	39.93
Vested or expected to vest in the future	715,768		$	30.02

Schedule of nonvested stock awards activity

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

	Three Months Ended
	December 31, 2013
	Shares		Weighted Average Grant Date Fair Value
Beginning of period	280,416		$	12.32
Granted	135,567		17.53
Vested	(102,038	)	16.64
Forfeited	(1,090	)	10.77
End of period	312,855		$	13.18