PENSIONS AND OTHER POSTRETIREMENT BENEFITS

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

PENSIONS AND OTHER POSTRETIREMENT BENEFITS

8. PENSIONS AND OTHER POSTRETIREMENT BENEFITS

Buckeye Pipe Line Services Company, which employs the majority of our workforce, sponsors a defined benefit plan, the Retirement Income Guarantee Plan (the “RIGP”), and an unfunded post-retirement benefit plan (the “Retiree Medical Plan”).  The RIGP and Retiree Medical Plan are closed and have limited participation. The components of the net periodic benefit cost for the RIGP and Retiree Medical Plan were as follows for the three months ended March 31, 2016 and 2015 (in thousands):

	RIGP						Retiree Medical Plan
	Three Months Ended   March 31,						Three Months Ended   March 31,
	2016			2015			2016		2015
Service cost	$	(9	)	$	3		$	91	$	91
Interest cost	127			138			333		333
Expected return on plan assets	(71		)	(84		)	—		—
Amortization of unrecognized losses	145			211			50		50
Net periodic benefit cost	$	192		$	268		$	474	$	474

During the three months ended March 31, 2016 and 2015, we contributed $0.8 million and $0.2 million, respectively, in aggregate to the RIGP and Retiree Medical Plans.