Pensions and Other Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

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 and nine months endedSeptember 30, 2015 and 2014 (in thousands):

	Pension Benefits Three Months Ended September 30,				Other Benefits Three Months Ended September 30,
	2015		2014		2015		2014
Service cost	$	128	$	59	$	—	$	1
Interest cost		474		474		6		17
Expected return on plan assets		(526)		(464)		—		—
Amortization of net actuarial loss		199		121		3		7
Amortization of prior service credits		—		—		3		2
Net periodic cost	$	275	$	190	$	12	$	27

	Pension Benefits Nine Months Ended September 30,				Other Benefits Nine Months Ended September 30,
	2015		2014		2015		2014
Service cost	$	384	$	141	$	1	$	2
Interest cost		1,422		1,411		33		52
Expected return on plan assets		(1,580)		(1,411)		—		—
Recognition due to settlement		—		—		428		—
Amortization of net actuarial loss		597		307		25		22
Amortization of prior service credits		—		—		8		7
Net periodic cost	$	823	$	448	$	495	$	83