Note

Employee Benefit Plans

We sponsor defined benefit pension plans covering substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the

three

and

six

months ended

June

30,

2018

and

2017

(in thousands):

	Three Months Ended June 30,
	2018			2017
Service cost	$	1,252		$	1,196
Interest cost		1,377			1,339
Expected return on plan assets		(1,634	)		(1,462	)
Amortization of prior service cost		15			(84	)
Amortization of net loss		931			1,033
Net periodic pension cost	$	1,941		$	2,022

	Six Months Ended June 30,
	2018			2017
Service cost	$	2,504		$	2,392
Interest cost		2,754			2,678
Expected return on plan assets		(3,268	)		(2,924	)
Amortization of prior service cost		30			(168	)
Amortization of net (gain) loss		1,862			2,066
Net periodic pension cost	$	3,882		$	4,044

For the

three

- and

six

-month periods ended

June

30,

2018,

the service cost component of net periodic pension cost is included in the same line items of our condensed consolidated financial statements as other employee compensation costs, and the net expense of

$0.7

million and

$1.4

million, respectively, related to all other components of net periodic pension cost is included in other (expense) income on our condensed consolidated statements of operations and comprehensive income (loss). For the

three

- and

six

-month periods ended

June

30,

2017,

all components of net periodic pension cost are included in the same line items of our condensed consolidated financial statements as other employee compensation costs.

April 2018,

we contributed

$1.3

million in cash to our defined benefit plans, and expect to contribute an additional

$2.6

million in cash or shares of our common stock to our defined benefit plans in

2018.

We expect to contribute approximately

$0.5

million to our unfunded supplemental executive retirement plan during

2018.