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Summary of Significant Accounting Policies - Schedule of Company's Intangibles (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets:
Above-market leases, net	$ 30.3	$ 38.6
Liabilities:
Below-market leases, net	$ (155.3)	$ (139.3)

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- Definition

Business acquisition purchase price allocation above-market leases, net.

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- Definition

Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

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