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Lease Agreements - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Base rent $ 185.7    
Base rent (including straight-line rent)   $ 184.7 $ 181.1
Expense recoveries 36.5 35.5 35.3
Variable lease income $ 0.9    
Percentage rent   $ 1.0 $ 1.5