Information on Business Segments Details 1 (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 2,588,496	$ 2,738,335
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Assets	1,789,432	1,879,258
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Assets	658,323	704,318
Other
Segment Reporting Information [Line Items]
Assets	$ 140,741	$ 154,759