12. 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 and supplemental retirement plans (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, 2014 and 2013 (in thousands):


	Pension Benefits Three Months Ended June 30,				Other Benefits Three Months Ended June 30,
	2014		2013		2014		2013
Service cost	$	41	$	9	$	—	$	2
Interest cost		468		458		18		10
Expected return on plan assets		(473)		(402)		—		—
Amortization of net actuarial loss		93		1,515		7		4
Amortization of prior service credits		—		—		3		(6)
Net periodic cost	$	129	$	1,580	$	28	$	10


	Pension Benefits Six Months Ended June 30,				Other Benefits Six Months Ended June 30,
	2014		2013		2014		2013
Service cost	$	82	$	156	$	1	$	4
Interest cost		937		921		35		20
Expected return on plan assets		(947)		(829)		—		—
Amortization of net actuarial loss		186		3,018		15		8
Amortization of prior service credits		—		—		5		(12)
Net periodic cost	$	258	$	3,266	$	56	$	20

Amortization of net actuarial loss related to Pension Benefits for the three and six months ended June 30, 2013 includes accelerated amortization as a result of the termination of our supplemental executive retirement plan. Final lump sum payments under this plan were made in December 2013.