Defined Benefit Pension Plans Defined Benefit Pension Plans (Tables)

9 Months Ended

Sep. 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:

	September 30, 2015		December 31, 2014
	(in thousands)
Assets
Plan assets in other long-term assets	$	400	$	567
Liabilities
Current portion of pension plan liability in wages and benefits payable	3,498		4,552
Long-term portion of pension plan liability	94,100		101,432
Net pension plan benefit liability	$	97,198	$	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 September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(in thousands)
Service cost	$	904		$	723		$	3,162		$	2,750
Interest cost	595			871			1,820			2,661
Expected return on plan assets	(122		)	(158		)	(387		)	(478		)
Settlements and other	375			6			374			33
Amortization of actuarial net loss	488			118			1,470			363
Amortization of unrecognized prior service costs	14			17			43			53
Net periodic benefit cost	$	2,254		$	1,577		$	6,482		$	5,382