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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Brandywine Realty Trust and Brandywine Operating Partnership, L.P.
Schedule II
Valuation and Qualifying Accounts
(in thousands)

Description
 
Balance at
Beginning
of Year
 
Additions
 
Deductions (1)
 
Balance
at End
of Year
Allowance for doubtful accounts:
 
 
 
 
 
 
 
 
Year-ended December 31, 2013
 
$
16,646

 
$
1,384

 
$
1,782

 
$
16,248

Year-ended December 31, 2012
 
$
15,485

 
$
1,891

 
$
730

 
$
16,646

Year-ended December 31, 2011
 
$
15,222

 
$
928

 
$
665

 
$
15,485


(1)
Deductions represent amounts that the Company had fully reserved for in prior years and pursuit of collection of such amounts was ceased during the year.