Information on Business Segments Details 1 (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 2,626,871	$ 2,676,226
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Assets	1,872,730	1,908,389
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Assets	601,093	623,547
Other
Segment Reporting Information [Line Items]
Assets	$ 153,048	$ 144,290