Commitments and Contingencies - Additional Information (Detail) (Forecast [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Dec. 31, 2014
Contingencies And Commitments [Line Items]
Receivable from contractual right	$ 26.1
Contractual right exchange period	3 years
Aloft Hotel National Harbor [Member]
Contingencies And Commitments [Line Items]
Number of room purchased	190
Purchase price of hotel	$ 21.8

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Period over which the Company will receive its consideration in exchange for its economic interest in the income from the land underlying the new casino project in National Harbor.

+ References

No definition available.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

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- Definition

The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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