Pension and Post-retirement Benefits (Tables)

9 Months Ended

Jun. 30, 2013

Pension and Post-retirement Benefits

Schedule of components of net periodic pension and postretirement benefit cost

	Three Months Ended June 30,												Nine Months Ended June 30,
	Pension Benefits						Other Benefits						Pension Benefits						Other Benefits
	2012			2013			2012			2013			2012			2013			2012			2013
Service cost	$	1,000		$	1,220		$	72		$	97		$	3,001		$	3,661		$	218		$	291
Interest cost	2,567			2,556			1,146			1,082			8,115			7,751			3,436			3,246
Expected return	(2,537		)	(3,138		)	—			—			(8,102		)	(9,500		)	—			—
Amortizations	2,436			2,727			(749		)	(518		)	7,359			8,198			(2,243		)	(1,553		)
Net periodic benefit cost	$	3,466		$	3,365		$	469		$	661		$	10,373		$	10,110		$	1,411		$	1,984