BENEFIT PLANS

We sponsor several defined benefit pension plans. Additionally, we provide varying levels of postretirement health care and life insurance benefits to some U.S. employees.

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



	Three Months Ended December 31,						Six Months Ended December 31,
(in thousands)	2016			2015			2016			2015
Service cost	$	727		$	1,156		$	1,460		$	2,319
Interest cost	7,770			9,438			15,579			18,923
Expected return on plan assets	(14,672		)	(14,657		)	(29,429		)	(29,364		)
Amortization of transition obligation	22			21			45			42
Amortization of prior service credit	(113		)	(104		)	(226		)	(209		)
Recognition of actuarial losses	2,088			1,815			4,200			3,648
Special termination benefit charge	—			54			—			107
Net periodic pension income	$	(4,178	)	$	(2,277	)	$	(8,371	)	$	(4,534	)

The special termination benefit charge of $0.1 million during the six months ended December 31, 2015 is the result of lump sum payments to several terminated Executive Retirement Plan participants.

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



	Three Months Ended December 31,						Six Months Ended December 31,
(in thousands)	2016			2015			2016			2015
Interest cost	$	168		$	210		$	337		$	420
Amortization of prior service credit	(6		)	(5		)	(11		)	(11		)
Recognition of actuarial loss	89			81			177			162
Net periodic other postretirement benefit cost	$	251		$	286		$	503		$	571