Employee Benefit Plans

9 Months Ended

Sep. 30, 2017

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plans

Pension Plans

The Company is the sponsor of three defined benefit plans that are frozen and no additional benefits are accruing thereunder. Two of the Company's defined benefit pension plans cover certain employees at designated repair facilities. The assets of these defined benefit pension plans are held by independent trustees and consist primarily of equity and fixed income securities. The Company also sponsors an unfunded, non-qualified supplemental executive retirement plan that covers several of the Company's current and former employees.

The components of net periodic benefit cost for the pension plans are as follows:

	Pension Benefits
	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2017			2016			2017			2016
	(in thousands)
Service cost	$	88		$	52		$	265		$	156
Interest cost	235			246			706			738
Expected return on plan assets	(283		)	(284		)	(848		)	(851		)
Amortization of net actuarial loss/prior service cost	184			206			552			618
Net periodic cost recognized	$	224		$	220		$	675		$	661