Pension Plan and Postretirement Benefits Other Than Pension (Tables)

12 Months Ended

Dec. 31, 2018

Pension Plan and Postretirement Benefits Other Than Pension

Schedule of changes in net funded status, disclosure of amounts recognized in the balance sheet, and the assumptions used to determine the benefit obligation

A reconciliation of the funded status of these plans and the assumptions related to the obligations at December 31, 2018, 2017 and 2016 are as follows:

					Other
	Pension Benefits				Postretirement Benefits
	2018		2017	2016	2018	2017	2016
	(in thousands)
Change in projected benefit obligation:
Net benefit obligation at beginning of year	$	184,245	180,921	210,783	2,195	2,446	8,421
Service cost		—	8,367	12,199	—	—	555
Interest cost		5,986	6,248	9,432	54	58	297
Benefits paid		(13,690)	(8,511)	(52,288)	(602)	(954)	(674)
Actuarial (gain) loss		(22,013)	28,841	(19,886)	(965)	139	1,790
Retiree contributions		—	—	—	366	506	532
Curtailment gain		—	(31,621)	—	—	—	(8,475)
Settlement loss		—	—	20,681	—	—	—
Net benefit obligation at end of year	$	154,528	184,245	180,921	1,048	2,195	2,446

					Other
	Pension Benefits				Postretirement Benefits
	2018		2017	2016	2018	2017	2016
	(in thousands)
Change in plan assets:
Fair value of plan assets at beginning of year	$	170,881	144,529	173,885	—	—	—
Actual return on plan assets		1,808	24,863	2,932	—	—	—
Employer contributions		4,000	10,000	20,000	236	448	142
Retiree contributions		—	—	—	366	506	532
Benefits paid		(13,690)	(8,511)	(52,288)	(602)	(954)	(674)
Fair value of plan assets at end of year	$	162,999	170,881	144,529	—	—	—
Funded status at end of year	$	8,471	(13,364)	(36,392)	(1,048)	(2,195)	(2,446)

								Other
	Pension Benefits							Postretirement Benefits
	2018			2017		2016		2018		2017		2016
	(in thousands, except percentage data)
Amounts recognized in the statement of financial position:
Noncurrent assets	$	8,471		—		—		—		—		—
Current liabilities		—		—		—		(250)		(422)		(458)
Noncurrent liabilities		—		(13,364)		(36,392)		(798)		(1,773)		(1,988)
Net amount recognized at end of year	$	8,471		(13,364)		(36,392)		(1,048)		(2,195)		(2,446)
Weighted average assumptions used to determine benefit obligation at December 31:
Discount rate		4.45	%	3.76	%	4.39	%	4.08	%	3.28	%	3.46	%
Rate of compensation increase		Not applicable				5.12	%	Not applicable

Schedule of Pension Plan asset allocation

Our Pension Plan asset allocation at December 31, 2018 and 2017 is as follows:

	Percentage of		Percentage of
	Plan Assets at		Plan Assets at
Plan assets by category	December 31, 2018		December 31, 2017
Cash	2	%	40	%
Equity securities:
Domestic	—		29	%
International	—		18	%
Fixed income securities	98	%	8	%
Gold bullion	—		5	%
Total	100	%	100	%

Summary of entity's pension plan assets fair value

2018	Level 1		Level 2	Level 3	Total
	(in thousands)
Cash equivalents	$	—	465	—		465
Equity securities:
International		—	4	—		4
Fixed income securities:
U.S. Treasuries		—	46,415	—		46,415
Corporate bond		—	91,521	—		91,521
Foreign bonds		—	21,870	—		21,870
Total investment securities		—	160,275	—		160,275
Cash						2,724
Total					$	162,999

2017	Level 1		Level 2	Level 3	Total
	(in thousands)
Cash equivalents	$	—	66,779	—		66,779
Equity securities:
Domestic		49,540	—	—		49,540
International		4,889	26,542	—		31,431
Fixed income securities:
U.S. Treasuries		—	6,455	—		6,455
Corporate bond		—	587	—		587
Foreign Bonds		—	6,591	—		6,591
Gold bullion		8,369	—	—		8,369
Total investment securities		62,798	106,954	—		169,752
Cash						1,129
Total					$	170,881

Schedule of components of net periodic pension and other postretirement costs

The components of net periodic pension and other postretirement costs consisted of the following for the years ended December 31, 2018, 2017 and 2016:

					Other
	Pension Benefits				Postretirement Benefits
	2018		2017	2016	2018	2017	2016
	(in thousands)
Components of net periodic benefit cost:
Service cost	$	—	8,367	12,199	—	—	555
Interest cost		5,986	6,248	9,432	54	58	297
Expected return on plan assets		(8,320)	(10,113)	(13,927)	—	—	—
Actuarial (gain) loss		(15,501)	14,091	(8,891)	—	—	—
Actuarial gain amortization		—	—	—	(120)	(180)	(153)
Prior service cost amortization		—	—	—	(2)	(4)	4
Curtailment gain		—	(31,621)	—	—	—	(8,475)
Settlement loss		—	—	20,681	—	—	—
Total	$	(17,835)	(13,028)	19,494	(68)	(126)	(7,772)

Schedule of weighted average assumptions used to determine net periodic cost

The weighted average assumptions used to determine net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 are as follows:

							Other
	Pension Benefits						Postretirement Benefits
	2018		2017		2016		2018		2017		2016
Discount rate	3.76	%	4.39% / 3.96	1%	4.60	%	3.28	%	3.46	%	4.44	%
Expected return on plan assets	5.00	%	7.00% / 6.00	1%	7.50	%	Not applicable
Rate of compensation increase	Not applicable		5.12	%	5.12	%	Not applicable

________________________

(1) Due to the Pension Plan freeze and associated remeasurement as of July 31, 2017, the discount rate changed from 4.39% to 3.96% and the expected return on assets changed from 7.00% to 6.00%.

Schedule of expected benefit payments to be paid

Under current plan provisions, we expect the following benefit payments to be paid:

			Other
	Pension		Postretirement
	Benefits		Benefits
	(in thousands)
2019	$	7,984	250
2020		8,068	179
2021		9,371	131
2022		8,843	116
2023		9,031	79
2024 through 2028		46,521	233
	$	89,818	988