Pensions and Other Postretirement Benefits (Tables)

6 Months Ended

Dec. 31, 2012

Pension Benefit Cost [Member]

Components of Pension and Retiree Health Care Benefit Cost

The components of pension benefit cost are as follows (in thousands):

	Three Months Ended December 31,						Six Months Ended December 31,
	2012			2011			2012			2011
Service cost	$	1,627		$	1,381		$	3,254		$	2,762
Interest cost		2,060			2,123			4,120			4,246
Expected return on plan assets		(2,272	)		(2,166	)		(4,544	)		(4,332	)
Amortization of prior service cost		65			65			130			130
Recognized actuarial losses		681			290			1,362			580
Amortization of transition obligation		10			10			20			20
Other income		(59	)		—			(118	)		—
Benefit cost	$	2,112		$	1,703		$	4,224		$	3,406

Postretirement Medical Benefits [Member]

Components of Pension and Retiree Health Care Benefit Cost

The components of retiree health care benefit cost are as follows (in thousands):

	Three Months Ended December 31,						Six Months Ended December 31,
	2012			2011			2012			2011
Service cost	$	179		$	274		$	358		$	548
Interest cost		341			586			682			1,172
Amortization of prior service cost		(516	)		(516	)		(1,032	)		(1,032	)
Recognized actuarial (gains) losses		(179	)		82			(358	)		164
Benefit cost	$	(175	)	$	426		$	(350	)	$	852