Information on Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Segment	Jun. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments			2
Net sales	$ 322,074	$ 267,394	$ 634,173	$ 530,940
Operating profit	45,381	36,149	80,506	61,105
Interest expense	2,804	3,241	6,123	7,598
Other expense (income), net	792	495	1,027	1,462
Income from continuing operations before income taxes	41,785	32,413	73,356	52,045
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	109,310	96,834	217,521	194,878
Operating profit	16,616	15,226	32,366	25,573
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	212,768	170,560	416,656	336,062
Operating profit	28,765	20,923	48,140	35,532
Intersegment sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ (4)	$ 0	$ (4)	$ 0