Pension Plan and Postretirement Benefits Other Than Pension (Tables)

6 Months Ended

Jun. 30, 2016

Pension Plan and Postretirement Benefits Other Than Pension

Schedule of components of net periodic pension and other postretirement costs

				Other							Other
	Pension Benefits			Postretirement Benefits		Pension Benefits				Postretirement Benefits
	Three months ended June 30,			Three months ended June 30,		Six months ended June 30,				Six months ended June 30,
	2016		2015	2016	2015	2016		2015		2016		2015
	(in thousands)					(in thousands)
Components of net periodic benefit cost:
Service cost		3,106	2,994	185	228		6,099		6,041		370		456
Interest cost		2,277	2,056	92	99		4,716		4,210		184		198
Expected return on plan assets		(3,427)	(3,565)	—	—		(6,963)		(7,256)		—		—
Actuarial (gain) loss amortization		1,469	1,209	(38)	—		3,107		2,585		(77)		—
Prior service cost amortization		93	115	1	5		187		230		2		10
Transition obligation amortization		1	1	—	—		2		2		—		—
Total (1)	$	3,519	2,810	240	332		7,148		5,812		479		664

(1) Approximately 60% of net periodic pension and other postretirement benefit costs are included in compensation and related costs on the consolidated statements of income, while the remainder is included in underwriting and distribution expense.