Information on Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment	Sep. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments			2
Net sales	$ 317,659	$ 269,491	$ 951,832	$ 800,430
Operating profit	50,885	28,031	131,391	89,136
Interest expense	2,435	2,401	8,558	10,000
Other expense (income), net	741	241	1,768	1,702
Income from continuing operations before income taxes	47,709	25,389	121,065	77,434
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	110,429	101,744	327,951	296,622
Operating profit	17,680	7,157	50,047	32,730
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	207,230	167,747	623,886	503,809
Operating profit	33,205	20,874	81,344	56,406
Intersegment sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0	$ (5)	$ (1)