Benefit Plans (Tables)

9 Months Ended

Mar. 31, 2017

Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net periodic pension (income)

The table below summarizes the components of net periodic pension income:

	Three Months Ended March 31,						Nine Months Ended March 31,
(in thousands)	2017			2016			2017			2016
Service cost	$	720		$	1,154		$	2,180		$	3,473
Interest cost	7,756			9,375			23,335			28,299
Expected return on plan assets	(14,659		)	(14,560		)	(44,088		)	(43,924		)
Amortization of transition obligation	22			19			67			61
Amortization of prior service credit	(113		)	(104		)	(339		)	(313		)
Recognition of actuarial losses	2,066			1,805			6,266			5,452
Settlement gain	(320		)	—			(320		)	—
Special termination benefit charge	—			—			—			214
Net periodic pension income	$	(4,528	)	$	(2,311	)	$	(12,899	)	$	(6,738	)

Other Postretirement Benefit Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net periodic pension (income)

The table below summarizes the components of net periodic other postretirement benefit cost:

	Three Months Ended March 31,						Nine Months Ended March 31,
(in thousands)	2017			2016			2017			2016
Interest cost	$	168		$	210		$	505		$	630
Amortization of prior service credit	(6		)	(6		)	(16		)	(16		)
Recognition of actuarial loss	89			81			266			242
Net periodic other postretirement benefit cost	$	251		$	285		$	755		$	856