Name:	bkd_ShareBasedCompensationSharesAuthorizedUnderRestrictedStockPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix:	bkd_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The ceiling of a customized range of grant date fair values for purposes of disclosing shares potentially issuable under restricted stock awards on all restricted stock plans and other required information pertaining to awards in the customized range.

No definition available.

Name:	bkd_ShareBasedCompensationSharesAuthorizedUnderRestrictedStockPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	bkd_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The maximum percentage rate stock-based compensation expense is calculated using net of forfeitures estimated from shares granted.

No definition available.

Name:	bkd_StockBasedCompensationPercentageOfEstimatedForfeituresMaximum
Namespace Prefix:	bkd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The estimated measure of the percentage of shares, units or grants expected to be forfeited.

No definition available.

Name:	bkd_StockBasedCompensationPercentageOfEstimatedForfeituresMinimum
Namespace Prefix:	bkd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of shares granted during the period related to Restricted Stock Awards, net of any shares forfeited.

No definition available.

Name:	bkd_StockGrantedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
Namespace Prefix:	bkd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Grant date fair value of stock related to Restricted Stock Awards granted during the period.

No definition available.