Defined Benefit Pension Plans Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2016

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Amounts Recognized in the Consolidated Balance Sheets [Table Text Block]

Amounts recognized on the Consolidated Balance Sheets consist of:

	March 31, 2016		December 31, 2015
	(in thousands)
Assets
Plan assets in other long-term assets	$	511	$	359
Liabilities
Current portion of pension benefit obligation in wages and benefits payable	3,159		3,493
Long-term portion of pension benefit obligation	88,312		85,971
Pension benefit obligation, net	$	90,960	$	89,105

Schedule of Net Periodic Pension Benefit Costs [Table Text Block]

Net periodic pension benefit costs for our plans include the following components:

	Three Months Ended March 31,
	2016			2015
	(in thousands)
Service cost	$	986		$	1,089
Interest cost	633			620
Expected return on plan assets	(126		)	(136		)
Settlements and other	(3		)	(1		)
Amortization of actuarial net loss	327			497
Amortization of unrecognized prior service costs	15			15
Net periodic benefit cost	$	1,832		$	2,084