Pensions

Components of Net Periodic Pension Cost

	Three Months Ended June 30						Six Months Ended June 30
	2017			2016			2017			2016

Service cost	$	270		$	255		$	540		$	509
Interest cost		398			400			796			800
Expected return on plan assets		(598	)		(559	)		(1,197	)		(1,117	)
Amortization of actuarial loss		123			140			246			280
Amortization of prior service cost		(3	)		(3	)		(6	)		(6	)
Rate-regulated adjustment		385			342			771			684
Net periodic pension expense	$	575		$	575		$	1,150		$	1,150

Employer Contributions

The Company previously disclosed in its financial statements for the year ended December 31, 2016 that it expected to contribute $2,300 to its pension plans in 2017. For the six months ended June 30, 2017, contributions of $1,150 had been made. The Company expects to contribute the remaining $1,150 over the final two quarters of 2017.