Other Assets and Intangibles - Summary of Estimated Net Future Amortization Associated with Above and Below-Market Leases (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Intangible Assets Net Excluding Goodwill [Abstract]
Future amortization income, 2017	$ 6.1
Future amortization income, 2018	7.6
Future amortization income, 2019	8.4
Future amortization income, 2020	8.5
Future amortization income, 2021	$ 8.8