Segment Reporting (Reportable Segments Consolidated Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Total Assets	$ 8,420,562	$ 7,804,024
Operating Segments [Member]
Total Assets	8,033,884	7,331,484
Operating Segments [Member] | Industrial [Member]
Total Assets	7,843,302	7,155,505
Operating Segments [Member] | Non-reportable segments
Total Assets	39,700	43,496
Operating Segments [Member] | Service Operations [Member]
Total Assets	150,882	132,483
Corporate, Non-Segment [Member]
Total Assets	$ 386,678	$ 472,540