Defined Benefit Pension Plans Defined Benefit Pension Plans (Tables)

6 Months Ended

Jun. 30, 2015

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:

	June 30, 2015		December 31, 2014
	(in thousands)
Assets
Plan assets in other long-term assets	$	505	$	567
Liabilities
Current portion of pension plan liability in wages and benefits payable	3,649		4,552
Long-term portion of pension plan liability	93,918		101,432
Net pension plan benefit liability	$	97,062	$	105,417

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 June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(in thousands)
Service cost	$	1,169		$	1,079		$	2,258		$	2,027
Interest cost	605			897			1,225			1,790
Expected return on plan assets	(129		)	(163		)	(265		)	(320		)
Settlements and other	—			29			(1		)	27
Amortization of actuarial net loss	485			122			982			245
Amortization of unrecognized prior service costs	14			18			29			36
Net periodic benefit cost	$	2,144		$	1,982		$	4,228		$	3,805