Debt (Schedule Of Debt) (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020	Jul. 02, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 254,911			$ 222,225
Gross Debt, Long-term Outstanding		1,736,751			1,890,778
Debt issuance costs, Current Outstanding		(3,661)			(4,131)
Debt issuance costs, Long-term Outstanding		(8,441)			(10,656)
Total Debt, Current Outstanding		251,250			218,094
Total Debt, Long-term Outstanding		1,728,310			1,880,122
Variable Interest Entity, Primary Beneficiary [Member]
Debt Instrument [Line Items]
Total Debt, Current Outstanding		33,175			26,931
Total Debt, Long-term Outstanding		82,975			100,849
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		2,000
Gross Debt, Long-term Outstanding		$ 695,000			$ 624,000
Average Interest		1.70%			3.30%
Maturity		Jun. 01, 2023
Maximum credit commitment				$ 521,900
Revolving Credit Facility [Member] | CAI Rail [Member]
Debt Instrument [Line Items]
Gross Debt, Long-term Outstanding	[1]	$ 137,500			$ 137,500
Average Interest	[1]	1.70%			3.30%
Maturity	[1]	Oct. 01, 2023
Maximum credit commitment		$ 250,000
Revolving Credit Facility [Member] | CAI Euro [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 21,561			$ 21,537
Average Interest		2.00%			2.00%
Maturity		Sep. 01, 2020
Term Loan [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 5,367			$ 5,250
Gross Debt, Long-term Outstanding		$ 28,520			$ 31,234
Average Interest		4.20%			4.20%
Maturity		Feb. 01, 2026
Term Loan [Member] | Term Loan Due April 2023 [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 1,800			$ 1,800
Gross Debt, Long-term Outstanding		$ 24,600			$ 25,500
Average Interest		2.80%			3.90%
Maturity		Apr. 01, 2023
Term Loan [Member] | Term Loan Due June 2021 [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 72,000			$ 7,000
Gross Debt, Long-term Outstanding					$ 68,500
Average Interest		2.70%			3.50%
Maturity		Jun. 01, 2021
Term Loan [Member] | Term Loan Due December 2020 [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 14,647			$ 15,284
Average Interest		3.40%			3.40%
Maturity		Dec. 01, 2020
Term Loan [Member] | Term Loan Due August 2021 [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 3,071			$ 3,016
Gross Debt, Long-term Outstanding		$ 36,086			$ 37,635
Average Interest		3.60%			3.60%
Maturity		Aug. 01, 2021
Term Loan [Member] | Term Loan Due October 2023 [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 6,000			$ 6,000
Gross Debt, Long-term Outstanding		$ 83,500			$ 86,500
Average Interest		4.60%			4.60%
Maturity		Oct. 01, 2023
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 6,110			$ 6,110
Gross Debt, Long-term Outstanding		$ 43,610			$ 46,665
Average Interest		4.90%			4.90%
Maturity		Sep. 01, 2022
Collateralized Financing Obligations [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 27,808			$ 21,681
Gross Debt, Long-term Outstanding		$ 54,455			$ 69,615
Average Interest		0.80%			1.50%
Maturity		Feb. 01, 2026
Series 2012-1 Asset-Backed Notes [Member] | Asset Backed Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding	[2]				$ 17,100
Gross Debt, Long-term Outstanding	[2]				$ 31,350
Average Interest	[2]				3.50%
Series 2013-1 Asset-Backed Notes [Member] | Asset Backed Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding	[2]				$ 22,900
Gross Debt, Long-term Outstanding	[2]				$ 51,525
Average Interest	[2]				3.40%
Series 2017-1 Asset-Backed Notes [Member] | Asset Backed Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 25,307			$ 25,307
Gross Debt, Long-term Outstanding		$ 151,842			$ 164,496
Average Interest		3.70%			3.70%
Maturity		Jun. 01, 2042
Series 2018-1 Asset-Backed Notes [Member] | Asset Backed Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 34,890			$ 34,890
Gross Debt, Long-term Outstanding		$ 232,600			$ 250,045
Average Interest		4.00%			4.00%
Maturity		Feb. 01, 2043
Series 2018-2 Asset-Backed Notes [Member] | Asset Backed Notes [Member]
Debt Instrument [Line Items]
Gross Debt, Current Outstanding		$ 34,350			$ 34,350
Gross Debt, Long-term Outstanding		$ 249,038			$ 266,213
Average Interest		4.40%			4.40%
Maturity		Sep. 01, 2043
Subsequent Event [Member] | Revolving Credit Facility [Member] | CAI Rail [Member]
Debt Instrument [Line Items]
Maximum credit commitment			$ 150,000

[1] The maximum credit commitment under the Rail revolving credit facility was decreased on July 2, 2020 from $250 million to $150 million.

[2] On April 27, 2020, the Company repaid in full the outstanding debt associated with the asset-backed notes 2012-1 and 2013-1.