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EMPLOYEE BENEFIT PLAN

6 Months Ended

Jun. 30, 2017

8.	EMPLOYEE BENEFIT PLAN

The following represents the net periodic benefit cost and related components of the Company’s multiple employers Retirement Income Plan:

	Three months ended June 30						Six months ended June 30
(in thousands)	2017			2016			2017			2016
Interest cost	$	483		$	502		$	966		$	1,004
Expected return on plan assets		(589	)		(532	)		(1,178	)		(1,066	)
Amortization of net losses		213			199			425			399
Net periodic benefit cost	$	107		$	169		$	213		$	337

The Company did not make a contribution to this plan during the six months ended June 30, 2017; however, a contribution of $900,000 was made during the six months ended June 30, 2016.

The Company permits selected highly compensated employees to defer a portion of their compensation into the non-qualified Supplemental Retirement Plan (“SERP”). The SERP assets are marked to market and totaled $20,859,000 as of June 30, 2017 and $18,367,000 as of December 31, 2016. The SERP assets are reported in non-current other assets on the consolidated balance sheets and changes in the fair value of these assets are reported in the consolidated statements of operations as compensation cost in selling, general and administrative expenses. Trading gains (losses) related to the SERP assets were approximately as follows:

	Three months ended June 30				Six months ended June 30
(in thousands)	2017		2016		2017		2016
Trading gains (losses), net	$	936	$	63	$	1,552	$	(264	)

The SERP liability includes participant deferrals net of distributions and is recorded on the consolidated balance sheets in long-term pension liabilities with any change in the fair value of the liabilities recorded as compensation cost within selling, general and administrative expenses in the consolidated statements of operations.