Employee Benefit Plans

6 Months Ended

Jun. 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   June 30,						Six Months Ended   June 30,
	2017			2016			2017			2016
	(in thousands)
Service cost	$	89		$	52		$	177		$	104
Interest cost	236			246			471			492
Expected return on plan assets	(283		)	(283		)	(565		)	(567		)
Amortization of net actuarial loss/prior service cost	184			206			368			412
Net periodic cost recognized	$	226		$	221		$	451		$	441