Retirement Plans

The Company sponsors defined benefit pension plans that cover hourly workers at its West Salem, Ohio plant, and hourly union employees at its Woodbridge, New Jersey plant, as well as a defined benefit retirement plan covering U.S. salaried employees, which was frozen in 1998 and subsequently replaced with a defined contribution plan (such plans collectively, the “Domestic Plans”). The Company also sponsors a defined benefit pension plan covering the Canadian salaried employees and hourly union employees at the Lambeth, Ontario plant, a defined benefit pension plan for the hourly union employees at its Burlington, Ontario plant and a defined benefit pension plan for the hourly union employees at its Pointe Claire, Quebec plant (such plans collectively, the “Foreign Plans”). In 2014, the pension plans for Pointe Claire and Burlington were amended to reflect an increase in benefits, effective November 15, 2015 and September 1, 2016, respectively. Also, the Pointe Claire plan was amended to disallow a lump sum payment feature that triggered settlement losses recorded in previous years.

The Company also provides postretirement benefits other than pension (“OPEB plans”) including health care or life insurance benefits to certain U.S. and Canadian retirees and in some cases, their spouses and dependents. The Company’s postretirement benefit plans in the U.S. include an unfunded health care plan for hourly workers at the Company’s former steel siding plant in Cuyahoga Falls, Ohio. With the closure of this facility in 1991, no additional employees are eligible to participate in this plan. There are three other U.S. unfunded plans covering either life insurance or health care benefits for small frozen groups of retirees. The Company’s foreign postretirement benefit plan provides life insurance benefits to active members at its Pointe Claire, Quebec plant and a closed group of Canadian salaried retirees. The actuarial valuation measurement date for the defined pension plans and postretirement benefits other than pension is December 31.

Components of net periodic benefit cost for the Company’s defined benefit pension plans and OPEB plans are as follows (in thousands):



	Quarters Ended
	April 2, 2016									April 4, 2015
	Domestic Plans			Foreign Plans			OPEB Plans			Domestic Plans			Foreign Plans			OPEB Plans
Service cost	$	316		$	620		$	3		$	331		$	641		$	4
Interest cost	827			770			31			806			791			43
Expected return on assets	(854		)	(832		)	—			(973		)	(938		)	—
Amortization of unrecognized:
Prior service costs (credits)	3			5			(2		)	3			6			(2		)
Cumulative actuarial net loss (gain)	21			49			(45		)	104			59			(5		)
Net periodic benefit cost	$	313		$	612		$	(13	)	$	271		$	559		$	40

Although changes in market conditions, current pension law and uncertainties regarding significant assumptions used in the actuarial valuations may have a material impact on future required contributions to the Company’s pension plans, the Company currently does not expect funding requirements to have a material adverse impact on current or future liquidity.

The actuarial valuations require significant estimates and assumptions to be made by management, primarily the funding interest rate, discount rate and expected long-term return on plan assets. These assumptions are all susceptible to changes in market conditions. The funding interest rate and discount rate are based on representative bond yield curves maintained and monitored by independent third parties. In determining the expected long-term rate of return on plan assets, the Company considers historical market and portfolio rates of return, asset allocations and expectations of future rates of return.