Information on Business Segments Details 1 (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 2,610,116	$ 2,738,335
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Assets	1,834,736	1,879,258
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Assets	631,765	704,318
Other
Segment Reporting Information [Line Items]
Assets	$ 143,615	$ 154,759