Pensions and Other Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2017

Pensions and Other Employee Benefit Plans [Abstract]

Components of Net Periodic Cost

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 months ended March 31, 2017 and 2016 (in thousands):

	Pension Benefits				Other Benefits
	Three Months Ended March 31,				Three Months Ended March 31,
	2017		2016		2017		2016
Service cost	$	173	$	142	$	—	$	—
Interest cost		486		490		5		5
Expected return on plan assets		(532)		(512)		—		—
Amortization of net actuarial loss		232		196		1		1
Amortization of prior service credits		—		—		6		6
Net periodic cost	$	359	$	316	$	12	$	12