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Owners' Equity - Operating Partnership Common Units (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Aug. 31, 2015
Common Shares        
Units issued in connection with acquisitions 0 0 0  
Share Repurchase        
Share repurchase, value $ 40,896 $ 71,802    
Liberty Property Limited Partnership [Member]        
Common Shares        
Common units outstanding 3,530,031 3,539,075    
Closing price of the common shares $ 139,400      
Units issued in connection with acquisitions 0 0 0  
Share Repurchase        
Share repurchase, value $ 40,896 $ 71,802    
Liberty Property Limited Partnership [Member] | Common units [Member]        
Dividend Reinvestment and Share Purchase Plan        
Dividend reinvestment plan 56,426 1,036,437 1,643,536  
Liberty Property Limited Partnership [Member] | 2015 Share Repurchase Program [Member] | Common units [Member]        
Share Repurchase        
Stock repurchase program, authorized amount       $ 250,000
Share repurchase, shares 1,400,000 2,300,000    
Share repurchase, value $ 40,900 $ 71,800