Investment in ECN Capital Corporation - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Dec. 28, 2024	Dec. 30, 2023	Dec. 28, 2024	Dec. 30, 2023	Mar. 30, 2024
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses)		$ 568	$ 0	$ (1,466)	$ 0
Investment in the common stock		1,587		1,587		$ 1,605
Value of investment in preferred shares		64,500		64,500		64,500
Floor plan payable		88,198		88,198		91,286
Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Dividend income		1,200	600	2,400	600
ECN Capital Corp.
Schedule of Equity Method Investments [Line Items]
Equity investments in ECN	$ 137,800
Common shares purchased	33.6
Percentage of common stock outstanding	12.00%
Cash dividend on preferred Shares	4.00%
Voting shares	19.90%
Percentage of ownership	51.00%
Share of earnings (losses)		700	$ (200)	100	$ (200)
Investment in the common stock		71,000		71,000		$ 71,900
Aggregate value of investments		73,000		73,000
Commitments on retailer floor plan loans outstanding		118,500		118,500
ECN Capital Corp. | Mandatory convertible preferred shares
Schedule of Equity Method Investments [Line Items]
Number of shares issued	27.5
Triad Financial Services, Inc
Schedule of Equity Method Investments [Line Items]
Percentage of ownership	49.00%
Floor plan payable		$ 31,900		$ 31,900