Restructuring (Tables)

12 Months Ended

Dec. 31, 2016

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

The following table presents a summary of the restructuring activity for the years ended December 31, 2016, 2015 and 2014.

	Severance Charges			Other Associated Costs			Total
	(in thousands)
Accrued charges at December 31, 2013	$	33		$	—		$	33
Costs incurred	739			—			739
Costs paid	(33		)	—			(33		)
Accrued charges at December 31, 2014	739			—			739
Costs incurred	3,434			290			3,724
Costs paid	(868		)	(290		)	(1,158		)
Accrued charges at December 31, 2015	3,305			—			3,305
Costs incurred	2,017			—			2,017
Costs paid	(3,345		)	—			(3,345		)
Accrued charges at December 31, 2016	$	1,977		$	—		$	1,977