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Schedule II - Valuation and Qualifying Accounts (Notes)
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
SCHEDULE II
JBG SMITH PROPERTIES
VALUATION AND QUALIFYING ACCOUNTS


 
Balance at
Beginning of Year
 
Additions Charged
Against
Operations
 
Adjustments to Valuation Accounts
 
Uncollectible
Accounts
Written‑off
 
Balance at
End of Year
 
(In thousands)
Allowance for doubtful accounts (1)
   for year ended December 31:
 
 
 
 
 
 
 
 
 
2018
$
6,285

 
$
3,298

 
$
—

 
$
(1,989
)
 
$
7,594

2017
$
4,526

 
$
3,807

 
$
—

 
$
(2,048
)
 
$
6,285

2016
$
4,431

 
$
751

 
$
—

 
$
(656
)
 
$
4,526

_______________
(1) Includes allowance for doubtful accounts related to tenant and other receivables and deferred rent receivable.