Information on Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013 Segment	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Number of reportable segments (in segments)		2
Net sales	$ 269,491		$ 232,476	$ 800,430	$ 670,580
Operating profit	28,031		22,486	89,136	72,864
Interest expense	2,401		3,243	10,000	8,046
Other expense (income), net	241		873	1,702	1,787
Total before tax	25,389		18,370	77,434	63,031
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	101,744		98,370	296,622	289,391
Operating profit	7,157		14,122	32,730	39,798
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	167,747		134,107	503,809	381,191
Operating profit	20,874		8,364	56,406	33,066
Intersegment sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0		$ (1)	$ (1)	$ (2)