Special Charges (Announced Restructuring Charges (Recoveries)) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	$ 4,459
2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		$ 4,040
2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		4,767
2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		7,054
Facility Closing [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	802
Facility Closing [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		(125)
Facility Closing [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		31
Facility Closing [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		2,590
Employee Severance [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	3,657
Employee Severance [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		4,165
Employee Severance [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		4,736
Employee Severance [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		4,464
Energy [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	3,184
Energy [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		3,043
Energy [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		1,399
Energy [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		5,062
Energy [Member] | Facility Closing [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	708
Energy [Member] | Facility Closing [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		(382)
Energy [Member] | Facility Closing [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		(64)
Energy [Member] | Facility Closing [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		2,117
Energy [Member] | Employee Severance [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	2,476
Energy [Member] | Employee Severance [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		3,425
Energy [Member] | Employee Severance [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		1,463
Energy [Member] | Employee Severance [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		2,945
Advanced Flow Solutions [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	1,275
Advanced Flow Solutions [Member] | California Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	4,500
Advanced Flow Solutions [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		997
Advanced Flow Solutions [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		3,051
Advanced Flow Solutions [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		1,992
Advanced Flow Solutions [Member] | Facility Closing [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	94
Advanced Flow Solutions [Member] | Facility Closing [Member] | California Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	3,700
Advanced Flow Solutions [Member] | Facility Closing [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		257
Advanced Flow Solutions [Member] | Facility Closing [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		95
Advanced Flow Solutions [Member] | Facility Closing [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		473
Advanced Flow Solutions [Member] | Employee Severance [Member] | 2016 Actions Restructuring Charges (Recoveries) [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	1,181
Advanced Flow Solutions [Member] | Employee Severance [Member] | California Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date	$ 800
Advanced Flow Solutions [Member] | Employee Severance [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		740
Advanced Flow Solutions [Member] | Employee Severance [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		2,956
Advanced Flow Solutions [Member] | Employee Severance [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		1,519
Corporate [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		317
Corporate [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | Facility Closing [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | Facility Closing [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | Facility Closing [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | Employee Severance [Member] | 2015 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		0
Corporate [Member] | Employee Severance [Member] | 2014 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		317
Corporate [Member] | Employee Severance [Member] | 2013 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date		$ 0