Special Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Restructuring Cost and Reserve [Line Items]
Other Nonrecurring (Income) Expense	$ 1,378	$ 0
Restructuring Reserve [Roll Forward]
Restructuring Reserve Beginning of Period	800
Restructuring Charges	1,378
Restructuring Reserve, Settled with Cash	2,107
Restructuring Reserve End of Period	71
Facility-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	919
Employee-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	459
Energy Segment [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	365
Energy Segment [Member] | Facility-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	356
Energy Segment [Member] | Employee-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	9
Aerospace [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	926
Aerospace [Member] | Facility-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	539
Aerospace [Member] | Employee-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	387
Flow Technologies [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	87
Flow Technologies [Member] | Facility-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	24
Flow Technologies [Member] | Employee-related Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 63