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Other Assets and Intangibles - Summary of Estimated Future Amortization Expense Associated with Intangible Assets, Excluding Above and Below-Market Leases (Detail)
$ in Millions
Dec. 31, 2018
USD ($)
Intangible Assets Net Excluding Goodwill [Abstract]  
Future amortization expense, 2019 $ 17.9
Future amortization expense, 2020 12.6
Future amortization expense, 2021 9.9
Future amortization expense, 2022 7.9
Future amortization expense, 2023 $ 6.2