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Schedule II
 12 Months Ended
Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure
Liberty Property Trust and Liberty Property Limited Partnership
Schedule II (in thousands)

The following table details the activity for the allowance for doubtful accounts.
 
Balance at December 31, 2016
 
Additions
 
Deductions
 
Balance at December 31, 2017
Allowance for Doubtful Accounts - Straight Line Rent
$
530

 
$
1,729

 
$
(1,710
)
 
$
549

Allowance for Doubtful Accounts - Accounts Receivable
6,802

 
7,248

 
(7,987
)
 
6,063

Total
$
7,332

 
$
8,977

 
$
(9,697
)
 
$
6,612

 
 
 
 
 
 
 
 
 
Balance at December 31, 2015
 
Additions
 
Deductions
 
Balance at December 31, 2016
Allowance for Doubtful Accounts - Straight Line Rent
$
581

 
$
824

 
$
(875
)
 
$
530

Allowance for Doubtful Accounts - Accounts Receivable
6,317

 
4,950

 
(4,465
)
 
6,802

Total
$
6,898

 
$
5,774

 
$
(5,340
)
 
$
7,332

 
 
 
 
 
 
 
 
 
Balance at December 31, 2014
 
Additions
 
Deductions
 
Balance at December 31, 2015
Allowance for Doubtful Accounts - Straight Line Rent
$
910

 
$
1,233

 
$
(1,562
)
 
$
581

Allowance for Doubtful Accounts - Accounts Receivable
6,490

 
4,246

 
(4,419
)
 
6,317

Total
$
7,400

 
$
5,479

 
$
(5,981
)
 
$
6,898