FINANCING OBLIGATION (Details) $ in Thousands	3 Months Ended
Oct. 29, 2016 USD ($)
Financing Obligation
Cash proceeds from landlord	$ 13,250

Cash proceeds received from a landlord and recorded as a financing obligation.

No definition available.

Name:	bont_CashProceedsFromLandlord
Namespace Prefix:	bont_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration