Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net income (loss)	$ (71)	$ 11,099
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	105,157	100,459
Amortization of deferred financing costs	2,386	2,344
Amortization of debt discount/(premium), net	(324)	748
Amortization of stock compensation costs	3,752	4,048
Shares used for employee taxes upon vesting of share awards	(1,266)	(1,061)
Straight-line rent income	(7,183)	(11,250)
Amortization of acquired above (below) market leases, net	(3,698)	(3,556)
Straight-line ground rent expense	44	894
Provision for doubtful accounts	1,272	997
Net Gain (Loss) On Real Estate Venture Transactions, including real estate venture formation	(417)	3,683
Net gain on sale of interests in real estate	(2,087)	(3,044)
Gain from remeasurement of investment in a real estate venture	(458)	(7,847)
Loss on early extinguishment of debt	0	1,116
Real estate venture income in excess of distributions	558	(2,031)
Deferred financing obligation	(590)	(896)
Changes in assets and liabilities:
Accounts receivable	(6,328)	2,035
Other assets	1,462	6,031
Accounts payable and accrued expenses	(2,815)	(1,252)
Deferred income, gains and rent	(116)	608
Other liabilities	129	474
Net cash from operating activities	90,241	96,233
Cash flows from investing activities:
Acquisition of properties	(12,405)	(20,758)
Sales of properties, net	40,149	145,931
Distribution of sales proceeds from real estate venture	0	16,963
Proceeds from repayment of mortgage notes receivable	2,800	200
Capital expenditures for tenant improvements	(58,035)	(46,828)
Capital expenditures for redevelopments	(4,773)	(4,676)
Capital expenditures for developments	(19,270)	(72)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	16	(693)
Investment in unconsolidated Real Estate Ventures	(3,095)	(12,568)
Escrowed cash	1,758	558
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	5,329	3,445
Leasing costs	(13,862)	(14,313)
Net cash from (used in) investing activities	(61,388)	69,165
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	0	186,000
Repayments of Credit Facility borrowings	0	(255,000)
Repayments of mortgage notes payable	(6,647)	(5,537)
Deferred financing obligation interest expense	0	466
Net proceeds from issuance of common shares	0	181,527
Repayments of unsecured notes	0	(12,912)
Debt financing costs	(35)	(6)
Exercise of stock options	709	1,762
Distributions paid to shareholders	(50,710)	(46,745)
Distributions to noncontrolling interest	(541)	(554)
Net cash from (used in) financing activities	(57,224)	49,001
Increase (Decrease) in cash and cash equivalents	(28,371)	214,399
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	234,836	215,948
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2014 and 2013 of $2,726 and $1,305, respectively	66,869	67,844
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	0	(21,649)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,517)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	462
Change in investments in joint venture related to non-cash disposition of property	(5,897)	0
Change in investments in joint venture related to non-cash acquisition of property	0	13,040
Change in operating real estate related to non-cash adjustment to land	0	(4,386)
Change in receivable from settlement of acquisitions	619	0
Change in investments in real estate ventures related to a contribution of land	0	(6,058)
Change in capital expenditures financed through accounts payable at period end	(639)	(1,227)
Change in capital expenditures financed through retention payable at period end	1,188	(348)
Change in unfunded tenant allowance	(193)	(244)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income (loss)	(71)	11,099
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	105,157	100,459
Amortization of deferred financing costs	2,386	2,344
Amortization of debt discount/(premium), net	(324)	748
Amortization of stock compensation costs	3,752	4,048
Shares used for employee taxes upon vesting of share awards	(1,266)	(1,061)
Straight-line rent income	(7,183)	(11,250)
Amortization of acquired above (below) market leases, net	(3,698)	(3,556)
Straight-line ground rent expense	44	894
Provision for doubtful accounts	1,272	997
Net Gain (Loss) On Real Estate Venture Transactions, including real estate venture formation	(417)	3,683
Net gain on sale of interests in real estate	(2,087)	(3,044)
Gain from remeasurement of investment in a real estate venture	(458)	(7,847)
Loss on early extinguishment of debt	0	1,116
Real estate venture income in excess of distributions	558	(2,031)
Deferred financing obligation	(590)	(896)
Changes in assets and liabilities:
Accounts receivable	(6,328)	2,035
Other assets	1,462	6,031
Accounts payable and accrued expenses	(2,815)	(1,252)
Deferred income, gains and rent	(116)	608
Other liabilities	129	474
Net cash from operating activities	90,241	96,233
Cash flows from investing activities:
Acquisition of properties	(12,405)	(20,758)
Sales of properties, net	40,149	145,931
Distribution of sales proceeds from real estate venture	0	16,963
Proceeds from repayment of mortgage notes receivable	2,800	200
Capital expenditures for tenant improvements	(58,035)	(46,828)
Capital expenditures for redevelopments	(4,773)	(4,676)
Capital expenditures for developments	(19,270)	(72)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	16	(693)
Investment in unconsolidated Real Estate Ventures	(3,095)	(12,568)
Escrowed cash	1,758	558
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	5,329	3,445
Leasing costs	(13,862)	(14,313)
Net cash from (used in) investing activities	(61,388)	69,165
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	0	186,000
Repayments of Credit Facility borrowings	0	(255,000)
Repayments of mortgage notes payable	(6,647)	(5,537)
Deferred financing obligation interest expense	0	466
Net proceeds from issuance of common shares	0	181,527
Repayments of unsecured notes	0	(12,912)
Debt financing costs	(35)	(6)
Exercise of stock options	709	1,762
Distributions paid to shareholders	(51,251)	(47,299)
Net cash from (used in) financing activities	(57,224)	49,001
Increase (Decrease) in cash and cash equivalents	(28,371)	214,399
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	234,836	215,948
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2014 and 2013 of $2,726 and $1,305, respectively	66,869	67,844
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	0	(21,649)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,517)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	462
Change in investments in joint venture related to non-cash disposition of property	(5,897)	0
Change in investments in joint venture related to non-cash acquisition of property	0	13,040
Change in operating real estate related to non-cash adjustment to land	0	(4,386)
Change in receivable from settlement of acquisitions	619	0
Change in investments in real estate ventures related to a contribution of land	0	(6,058)
Change in capital expenditures financed through accounts payable at period end	(639)	(1,227)
Change in capital expenditures financed through retention payable at period end	1,188	(348)
Change in unfunded tenant allowance	$ (193)	$ (244)