Pensions and Other Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Pensions and Other Employee Benefit Plans [Abstract]

Components of Net Periodic Cost

The following tables provide the components of net periodic cost 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 six months ended June 30, 2018 and 2017 (in thousands):

	Pension Benefits Three Months Ended June 30,				Other Benefits Three Months Ended June 30,
	2018		2017		2018		2017
Service cost (1)	$	170	$	178	$	—	$	1
Interest cost (2)		463		494		4		4
Expected return on plan assets (2)		(657)		(530)		—		—
Amortization of net actuarial loss (2)		257		267		—		1
Amortization of prior service credits (2)		—		—		6		6
Net periodic cost	$	233	$	409	$	10	$	12

	Pension Benefits Six Months Ended June 30,				Other Benefits Six Months Ended June 30,
	2018		2017		2018		2017
Service cost (1)	$	357	$	351	$	—	$	1
Interest cost (2)		927		980		8		9
Expected return on plan assets (2)		(1,314)		(1,062)		—		—
Amortization of net actuarial loss (2)		520		499		—		2
Amortization of prior service credits (2)		—		—		12		12
Net periodic cost	$	490	$	768	$	20	$	24

⁽¹⁾ Included in general and administrative expenses.

⁽²⁾ Included in other expense.