Consolidated Statements of Income (Parenthetical) - $ / shares	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Limited partnership interest value	$ 1,000	$ 1,000	$ 1,000

The per unit price of limited partnership interest, which represents the book value of each interest and has been arbitrarily determined.

No definition available.

Name:	ck0000815917_LimitedPartnershipInterestValuePerUnit
Namespace Prefix:	ck0000815917_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration