Note 1. Summary of Significant Accounting Policies Goodwill and Intangibles (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0
Goodwill	195,900,000	154,200,000
Intangible Assets, Net (Excluding Goodwill)	79,000,000	28,100,000
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	0
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Railcar Leasing and Management Services Group [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 7,100,000	1,800,000
Rail Products Group [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 188,800,000	$ 152,400,000