v2.4.0.6

Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2012

Noncontrolling Interests [Abstract]

Noncontrolling Interests - Redeemable Preferred Units

Balance at January 1, 2012		$	55,652
Net income			801
Distributions			(801	)
Conversion of redeemable preferred units to common units			(4,115	)
Balance at March 31, 2012		$	51,537
Balance at January 1, 2011		$	55,652
Net income			823
Distributions			(823	)
Balance at March 31, 2011		$	55,652

X

- Definition

Schedule Of Series Two Preferred Units [Text Block]

+ References

No definition available.

+ Details

Name:	bxp_ScheduleOfSeriesTwoPreferredUnitsTextBlock
Namespace Prefix:	bxp_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_NoncontrollingInterestAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration