Pensions and Other Post-retirement Benefits (Tables)

6 Months Ended

12 Months Ended

Mar. 31, 2015

Sep. 30, 2014

EMPLOYEE BENEFIT PLANS

Schedule of components of net periodic benefit cost

	Three Months Ended						Six Months Ended
	March 31,						March 31,
	2015			2014			2015			2014
	(in thousands)						(in thousands)
Interest cost	$	1,171		$	1,201		$	2,342		$	2,402
Expected return on plan assets	(1,743		)	(1,664		)	(3,486		)	(3,328		)
Recognized net actuarial loss	309			229			618			458
Net pension expense	$	(263	)	$	(234	)	$	(526	)	$	(468	)

	Years Ended September 30,
	2014			2013			2012
	(in thousands)
Interest cost	$	4,763		$	4,339		$	4,498
Expected return on plan assets		(6,789	)		(6,099	)		(5,463	)
Amortization of prior service cost		—			1			2
Recognized net actuarial loss		873			2,372			3,567
Settlement		1,376			—			—
Net pension expense (benefit)	$	223		$	613		$	2,604