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[Line Items] for Significant Accounting Policies [Table]

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Balance held at close of period in number of shares.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Significant Accounting Policies (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Impairment charges	$ 12	$ 0	$ 1,100
Ownership percentage	8.20%
Investment in unconsolidated entity	$ 1,997		0
Increase in net cash provided by operating activities	3,949	4,554
Decrease in net cash used in investing activities	22,236	161,012
Restricted cash	$ 63,385	$ 35,779	$ 47,820	$ 37,855
Ashford Inc.
Significant Accounting Policies [Line Items]
Investment owned (in shares)	195		195
Ownership percentage	9.30%		9.30%
Investment in unconsolidated entity	$ 18,652		$ 18,124
Minimum \| Restricted Cash
Significant Accounting Policies [Line Items]
Replacement reserve escrow as percentage of property revenue	4.00%
Maximum \| Restricted Cash
Significant Accounting Policies [Line Items]
Replacement reserve escrow as percentage of property revenue	5.00%