Pensions and Other Employee Benefit Plans

9 Months Ended

Sep. 30, 2017

Pensions and Other Employee Benefit Plans [Abstract]

Pensions and Other Employee Benefit Plans

11. Pensions and Other Employee Benefit Plans

The following tables provide the components of net periodic cost included in general and administrative expenses for our qualified retirement plan (the “Pension Benefits”) and health care and life insurance benefits for retired employees and dependents (the “Other Benefits”) for the three and nine months ended September 30, 2017and 2016 (in thousands):

	Pension Benefits				Other Benefits
	Three Months Ended				Three Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Service cost	$	175	$	167	$	—	$	—
Interest cost		490		495		5		6
Expected return on plan assets		(531)		(512)		—		—
Amortization of net actuarial loss		250		223		1		1
Amortization of prior service credits		—		—		6		5
Net periodic cost	$	384	$	373	$	12	$	12

	Pension Benefits				Other Benefits
	Nine Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Service cost	$	526	$	501	$	1	$	1
Interest cost		1,470		1,486		14		16
Expected return on plan assets		(1,593)		(1,535)		—		—
Amortization of net actuarial loss		749		667		3		4
Amortization of prior service credits		—		—		18		16
Net periodic cost	$	1,152	$	1,119	$	36	$	37