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Subsequent Events (Details) | 1 Months Ended
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Feb. 28, 2018 community
Subsequent event |
Subsequent Event [Line Items] |
Number owned communities marketed to be sold | 30

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- Definition Number Of Communities Marketed To Be Sold + References No definition available. + Details
Name: | bkd_NumberOfCommunitiesMarketedToBeSold
Namespace Prefix: | bkd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |