Pension Plan and Postretirement Benefits Other Than Pension (Tables)

6 Months Ended

Jun. 30, 2017

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,
	2017		2016	2017	2016	2017		2016	2017	2016
	(in thousands)					(in thousands)
Components of net periodic benefit cost:
Service cost		2,683	3,106	—	185		5,409	6,099	—	370
Interest cost		1,604	2,277	14	92		3,258	4,716	29	184
Expected return on plan assets		(2,558)	(3,427)	—	—		(5,117)	(6,963)	—	—
Actuarial (gain) loss amortization		1,169	1,469	(45)	(38)		2,434	3,107	(90)	(77)
Prior service cost (credit) amortization		31	93	(1)	1		62	187	(2)	2
Transition obligation amortization		1	1	—	—		2	2	—	—
Total (1)	$	2,930	3,519	(32)	240		6,048	7,148	(63)	479

For the three months ended June 30, 2017, $1.8 million and $1.1 million of net periodic pension and other postretirement benefit costs were included in compensation and related costs and underwriting and distribution expense, respectively.  For the six months ended June 30, 2017, $3.7 million and $2.3 million of net periodic pension and other postretirement benefit costs were included in compensation and related costs and underwriting and distribution expense, respectively.