Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 11,099	$ 16,138
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	100,459	101,624
Amortization of deferred financing costs	2,344	2,572
Amortization of debt discount/(premium), net	748	745
Amortization of stock compensation costs	4,048	2,433
Shares used for employee taxes upon vesting of share awards	(1,061)	(2,234)
Straight-line rent income	(11,250)	(12,861)
Amortization of acquired above (below) market leases to rental revenue, net	(3,556)	(2,922)
Straight-line ground rent expense	894	949
Provision for doubtful accounts	997	962
Net gain on sale of interests in real estate	(3,044)	(24,834)
Net gain on real estate venture transactions	(3,683)	0
Gain from remeasurement of investment in a real estate venture	(7,847)	0
Loss on early extinguishment of debt	1,116	1,498
Real estate venture income in excess of distributions	(2,031)	(590)
Deferred financing obligation	(896)	(825)
Changes in assets and liabilities:
Accounts receivable	2,035	3,561
Other assets	6,589	5,260
Accounts payable and accrued expenses	(1,252)	(11,546)
Deferred income, gains and rent	608	(2,871)
Other liabilities	474	(1,438)
Net cash from operating activities	96,791	75,621
Cash flows from investing activities:
Acquisition of properties	(20,758)	(9,226)
Payments to acquire available-for-sale securities	0	(98,744)
Proceeds from Sale of Available-for-sale Securities	0	56,322
Sales of properties, net	145,931	120,957
Distribution of sales proceeds from real estate ventures	16,963	0
Proceeds from repayment of mortgage notes receivable	200	23,931
Capital expenditures for tenant improvements	(46,828)	(48,591)
Capital expenditures for redevelopments	(4,676)	(3,110)
Capital expenditures for developments	(72)	0
Reimbursement from real estate venture for pre-formation development costs	1,976	0
Advances for purchase of tenant assets, net of repayments	(693)	283
Investment in unconsolidated Real Estate Ventures	(12,568)	(18,617)
Cash distributions from unconsolidated real estate ventures	3,445	1,723
Leasing costs	(14,313)	(14,940)
Net cash from investing activities	68,607	9,988
Cash flows from financing activities:
Proceeds from Unsecured Term Loans	0	600,000
Proceeds from Credit Facility borrowings	186,000	21,500
Repayments of Credit Facility borrowings	(255,000)	(297,000)
Repayments of mortgage notes payable	(5,537)	(6,028)
Deferred financing obligation non-cash interest expense	466	468
Proceeds from Issuance of Common Stock	181,527	0
Proceeds from Issuance of Preferred Stock and Preference Stock	0	96,240
Redemption of preferred shares	0	(50,188)
Repayments of unsecured notes	(12,912)	(167,371)
Repayments of unsecured term loan	0	(37,500)
Net settlement of hedge transactions	0	(74)
Debt financing costs	(6)	(8,431)
Exercise of stock options	1,762	276
Distributions paid to shareholders	(46,745)	(47,059)
Distributions to noncontrolling interest	(554)	(797)
Net cash from financing activities	49,001	104,036
Increase in cash and cash equivalents	214,399	189,645
Cash and cash equivalents at beginning of period	1,549	410
Cash and cash equivalents at end of period	215,948	190,055
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2013 and 2012 of $1,305 and $1,207, respectively	67,844	69,480
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	(21,649)	0
Change in intangible assets, net related to non-cash acquisition of an operating property	(3,517)	0
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	462	0
Change in investments in joint venture related to non-cash acquisition of property	13,040	0
Change in operating real estate related to non-cash adjustment to land	(4,386)	0
Change in investments in real estate ventures related to a contribution of land	6,058	0
Change in capital expenditures financed through accounts payable at period end	(1,227)	(1,735)
Change in capital expenditures financed through retention payable at period end	(348)	56
Change in unfunded tenant allowance	(244)	(1,144)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income	11,099	16,138
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	100,459	101,624
Amortization of deferred financing costs	2,344	2,572
Amortization of debt discount/(premium), net	748	745
Amortization of stock compensation costs	4,048	2,433
Shares used for employee taxes upon vesting of share awards	(1,061)	(2,234)
Straight-line rent income	(11,250)	(12,861)
Amortization of acquired above (below) market leases to rental revenue, net	(3,556)	(2,922)
Straight-line ground rent expense	894	949
Provision for doubtful accounts	997	962
Net gain on sale of interests in real estate	(3,044)	(24,834)
Net gain on real estate venture transactions	(3,683)	0
Gain from remeasurement of investment in a real estate venture	(7,847)	0
Loss on early extinguishment of debt	1,116	1,498
Real estate venture income in excess of distributions	(2,031)	(590)
Deferred financing obligation	(896)	(825)
Changes in assets and liabilities:
Accounts receivable	2,035	3,561
Other assets	6,589	5,260
Accounts payable and accrued expenses	(1,252)	(11,546)
Deferred income, gains and rent	608	(2,871)
Other liabilities	474	(1,438)
Net cash from operating activities	96,791	75,621
Cash flows from investing activities:
Acquisition of properties	(20,758)	(9,226)
Payments to acquire available-for-sale securities	0	(98,744)
Proceeds from Sale of Available-for-sale Securities	0	56,322
Sales of properties, net	145,931	120,957
Distribution of sales proceeds from real estate ventures	16,963	0
Proceeds from repayment of mortgage notes receivable	200	23,931
Capital expenditures for tenant improvements	(46,828)	(48,591)
Capital expenditures for redevelopments	(4,676)	(3,110)
Capital expenditures for developments	(72)	0
Reimbursement from real estate venture for pre-formation development costs	1,976	0
Advances for purchase of tenant assets, net of repayments	(693)	283
Investment in unconsolidated Real Estate Ventures	(12,568)	(18,617)
Cash distributions from unconsolidated real estate ventures	3,445	1,723
Leasing costs	(14,313)	(14,940)
Net cash from investing activities	68,607	9,988
Cash flows from financing activities:
Proceeds from Unsecured Term Loans	0	600,000
Proceeds from Credit Facility borrowings	186,000	21,500
Repayments of Credit Facility borrowings	(255,000)	(297,000)
Repayments of mortgage notes payable	(5,537)	(6,028)
Deferred financing obligation non-cash interest expense	466	468
Proceeds from Issuance of Common Stock	181,527	0
Proceeds from Issuance of Preferred Stock and Preference Stock	0	96,240
Redemption of preferred shares	0	(50,188)
Repayments of unsecured notes	(12,912)	(167,371)
Repayments of unsecured term loan	0	(37,500)
Net settlement of hedge transactions	0	(74)
Debt financing costs	(6)	(8,431)
Exercise of stock options	1,762	276
Distributions paid to shareholders	(47,299)	(47,856)
Net cash from financing activities	49,001	104,036
Increase in cash and cash equivalents	214,399	189,645
Cash and cash equivalents at beginning of period	1,549	410
Cash and cash equivalents at end of period	215,948	190,055
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2013 and 2012 of $1,305 and $1,207, respectively	67,844	69,480
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	(21,649)	0
Change in intangible assets, net related to non-cash acquisition of an operating property	(3,517)	0
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	462	0
Change in investments in joint venture related to non-cash acquisition of property	13,040	0
Change in operating real estate related to non-cash adjustment to land	(4,386)	0
Change in investments in real estate ventures related to a contribution of land	6,058	0
Change in capital expenditures financed through accounts payable at period end	(1,227)	(1,735)
Change in capital expenditures financed through retention payable at period end	(348)	56
Change in unfunded tenant allowance	$ (244)	$ (1,144)