Information on Business Segments Details 1 (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 2,586,589	$ 2,676,226
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Assets	1,840,602	1,908,389
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Assets	590,251	623,547
Other
Segment Reporting Information [Line Items]
Assets	$ 155,736	$ 144,290