Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of Employee Benefit Plans

The components of net period benefit cost for the three and six months ended June 30, 2021 and 2020, respectively, are as follows:

	Three Months Ended June 30, 2021
	Retirement Income Plan		National Service-Related Pension Plan		Other Post-Retirement Benefits		Superannuation		Total
Components of net periodic benefit cost:	(In thousands)
Service cost	$	—	$	—	$	—	$	16	$	16
Interest cost	237		234		2		5		478
Expected return on plan assets	(596)		(427)		—		(19)		(1,042)
Amortization of net loss	218		163		—		—		381
Amortization of prior service cost	—		—		—		15		15
Net pension benefit cost	$	(141)	$	(30)	$	2	$	17	$	(152)

	Three Months Ended June 30, 2020
	Retirement Income Plan		National Service-Related Pension Plan		Other Post-Retirement Benefits		Superannuation		Total
Components of net periodic benefit cost:	(In thousands)
Service cost	$	—	$	—	$	—	$	14	$	14
Interest cost	316		280		3		6		605
Expected return on plan assets	(501)		(367)		—		(15)		(883)
Amortization of net loss	254		151		—		—		405
Amortization of prior service cost	—		—		—		7		7
Net pension benefit cost	$	69	$	64	$	3	$	12	$	148

	Six Months Ended June 30, 2021
	Retirement Income Plan		National Service-Related Pension Plan		Other Post-Retirement Benefits		Superannuation		Total
Components of net periodic benefit cost:	(In thousands)
Service cost	$	—	$	—	$	—	$	32	$	32
Interest cost	474		468		4		10		956
Expected return on plan assets	(1,192)		(854)		—		(38)		(2,084)
Amortization of net loss	436		326		—		—		762
Amortization of prior service cost	—		—		—		15		15
Net pension benefit cost	$	(282)	$	(60)	$	4	$	19	$	(319)

	Six Months Ended June 30, 2020
	Retirement Income Plan		National Service-Related Pension Plan		Other Post-Retirement Benefits		Superannuation		Total
Components of net periodic benefit cost:	(In thousands)
Service cost	$	—	$	—	$	—	$	28	$	28
Interest cost	631		559		7		12		1,209
Expected return on plan assets	(1,001)		(733)		—		(31)		(1,765)
Amortization of net loss	508		303		—		—		811
Amortization of prior service cost	—		—		—		15		15
Net pension benefit cost	$	138	$	129	$	7	$	24	$	298