Consolidated Statement of Cash Flows (Parentheticals) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Provision for impairment on assets held for sale/sold	$ (2,508)	$ 0
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2015 and 2014 of $5,623 and $2,726, respectively	5,623	2,726
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Provision for impairment on assets held for sale/sold	(2,508)	0
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2015 and 2014 of $5,623 and $2,726, respectively	$ 5,623	$ 2,726