Restructuring (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 2,140	$ 3,580	$ 10,126	$ 49,136
Operational Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	1,800		7,500
Total expected cost	16,000		16,000
Restructuring costs incurred since inception	$ 7,500		$ 7,500