Information on Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Segment	Mar. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments (in segments)	2
Net sales	$ 263,545	$ 222,795
Operating profit	24,955	24,618
Interest expense	4,357	2,368
Other expense (income), net	966	859
Income from continuing operations before income taxes	19,632	21,391
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	98,045	97,250
Operating profit	10,346	12,654
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	165,502	125,545
Operating profit	14,609	11,964
Intersegment sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ (2)	$ 0