In addition to the qualified defined benefit pension plans reflected in the table at the beginning of this note, the Company also has unfunded, nonqualified benefit plans for executive officers and certain key management employees that generally provide for defined

benefit payments at age 65 following the employee's retirement or, upon death, to their beneficiaries for a 15-year period. In February 2016, the Company froze the unfunded, nonqualified defined benefit plans to new participants and eliminated benefit increases. Vesting for participants not fully vested was retained.

The projected benefit obligation and accumulated benefit obligation for these plans at December 31 were as follows:



	2018		2017
	(In thousands)
Projected benefit obligation	$	93,988	$	102,484
Accumulated benefit obligation	$	93,988	$	102,484

Components of net periodic benefit cost for the Company's nonqualified benefit plans for the years ended December 31 were as follows:



	2018		2017		2016
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	185	$	289	$	493
Interest cost	3,157		3,494		3,742
Amortization of prior service cost	—		—		(80		)
Recognized net actuarial loss	1,047		883		952
Curtailment gain	—		—		(3,292		)
Net periodic benefit cost	$	4,389	$	4,666	$	1,815

Weighted average assumptions used at December 31 were as follows:



	2018		2017
Benefit obligation discount rate	3.86	%	3.20	%
Benefit obligation rate of compensation increase	N/A		N/A
Net periodic benefit cost discount rate	3.20	%	3.56	%
Net periodic benefit cost rate of compensation increase	N/A		N/A

The amount of future benefit payments for the unfunded, nonqualified benefit plans at December 31, 2018, are expected to aggregate as follows:



	2019		2020		2021		2022		2023		Thereafter
	(In thousands)
Nonqualified benefits	$	7,350	$	7,766	$	7,787	$	7,018	$	7,213	$	36,885

In 2012, the Company established a nonqualified defined contribution plan for certain key management employees. Expenses incurred under this plan for 2018, 2017 and 2016 were $597,000, $736,000 and $395,000, respectively.

The amount of investments that the Company anticipates using to satisfy obligations under these plans at December 31 was as follows:



	2018		2017
	(In thousands)
Investments
Insurance contract*	$	73,838	$	77,388
Life insurance**	37,274		38,568
Other	10,818		6,971
Total investments	$	121,930	$	122,927