XML 22 R26.htm IDEA: XBRL DOCUMENT

Research and Development	12 Months Ended
Research and Development	Dec. 31, 2019
Research and Development [Abstract]
Research, Development, and Computer Software Disclosure [Text Block]	The Company performs research and development under Company-funded programs and under contracts with the federal government and others. Expenditures committed to research and development amounted to $41.4 million, $37.3 million and $35.3 million in 2019, 2018 and 2017, respectively. Expenditures may fluctuate from year-to-year depending on special projects and needs.