Debt Obligations - Debt Covenants (Details) $ in Millions	Jul. 31, 2026 USD ($)
Debt Disclosure [Abstract]
Minimum net equity	$ 25.0
Maximum ratio of total assets-to-net equity	2

Debt Instrument, Covenant, Total Assets To Net Equity, Maximum Ratio

No definition available.

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Namespace Prefix:	bncww_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant