Debt - Schedule of Long Term Debt (Details) - USD ($)	9 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total mortgage and other debt, net of unamortized debt issuance costs	$ 633,139,000	$ 639,639,000
Total debt	$ 931,637,000	937,792,000
Weighted-average interest rate (as a percent)	4.03%
Mortgages
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (4,290,000)	(4,795,000)
Total mortgage and other debt, net of unamortized debt issuance costs	633,139,000	639,639,000
Unsecured Term Loan
Debt Instrument [Line Items]
Unamortized debt issuance costs	(1,502,000)	(1,847,000)
Total debt	298,498,000	298,153,000
Unsecured credit facility
Debt Instrument [Line Items]
Senior unsecured credit facility	$ 0
Unsecured credit facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Unsecured Term Loan Due May 2021
Debt Instrument [Line Items]
Interest rate	3.55%
Unsecured Term Loan Due May 2021 \| Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance	$ 100,000,000	100,000,000
Line of credit, variable rate basis description	LIBOR + 1.45% (2)
Unsecured Term Loan Due May 2021 \| Unsecured Term Loan \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.45%
Unsecured Term Loan Due April 2022
Debt Instrument [Line Items]
Interest rate	3.55%
Unsecured Term Loan Due April 2022 \| Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance	$ 200,000,000	200,000,000
Line of credit, variable rate basis description	LIBOR + 1.45% (2)
Unsecured Term Loan Due April 2022 \| Unsecured Term Loan \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.45%
Senior Unsecured Credit Facility \| Unsecured credit facility
Debt Instrument [Line Items]
Senior unsecured credit facility	$ 0	0
Line of credit, variable rate basis description	LIBOR + 1.50%
Senior Unsecured Credit Facility \| Unsecured credit facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Salt Lake City Marriott Downtown \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 55,600,000	56,717,000
Interest rate, stated percentage	4.25%
Westin Washington, D.C. City Center \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 63,269,000	64,833,000
Interest rate, stated percentage	3.99%
The Lodge at Sonoma, a Renaissance Resort and Spa \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 27,849,000	28,277,000
Interest rate, stated percentage	3.96%
Westin San Diego \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 63,761,000	64,859,000
Interest rate, stated percentage	3.94%
Courtyard Manhattan / Midtown East \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 82,990,000	84,067,000
Interest rate, stated percentage	4.40%
Renaissance Worthington \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 82,941,000	84,116,000
Interest rate, stated percentage	3.6625%
JW Marriott Denver at Cherry Creek \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 62,694,000	63,519,000
Interest rate, stated percentage	4.33%
Boston Westin \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 195,382,000	198,046,000
Interest rate, stated percentage	4.36%
New Market Tax Credit loan \| Mortgages
Debt Instrument [Line Items]
Principal balance	$ 2,943,000	$ 0
Interest rate, stated percentage	5.17%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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