Note 1. Summary of Significant Accounting Policies Goodwill and Intangibles (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)	$ 7,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	11,300,000
Payments to Acquire Businesses, Gross		$ 0
Goodwill, Impairment Loss	0	0
Goodwill	154,200,000	147,200,000
Intangible Assets, Net (Excluding Goodwill)	28,100,000	8,900,000
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	$ 1,800,000	1,800,000
Rail Products Group [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 152,400,000	$ 145,400,000