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Debt - Schedule of Long Term Debt (Details) - USD ($)		1 Months Ended	9 Months Ended
	Jul. 25, 2019	Jan. 31, 2019	Sep. 30, 2019	Jul. 24, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total mortgage and other debt, net of unamortized debt issuance costs			$ 619,956,000		$ 629,747,000
Total debt			1,093,655,000		977,966,000
Senior unsecured credit facility			$ 75,000,000		0
Weighted-average interest rate (as a percent)			3.87%
Mortgages
Debt Instrument [Line Items]
Unamortized debt issuance costs			$ (3,434,000)		(4,017,000)
Total mortgage and other debt, net of unamortized debt issuance costs			619,956,000		629,747,000
Unsecured Term Loan
Debt Instrument [Line Items]
Unamortized debt issuance costs			(1,301,000)		(1,781,000)
Total debt			$ 398,699,000		348,219,000
Unsecured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.40%
Unsecured credit facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.45%
Unsecured Term Loan Due May 2021 | Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance			$ 0		100,000,000
Line of credit, variable rate basis description			LIBOR + 1.45%
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 | Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance			$ 0		200,000,000
Line of credit, variable rate basis description			LIBOR + 1.45%
Unsecured Term Loan Due April 2022 | Unsecured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.45%
Unsecured Term Loan Due October 2023 | Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance			$ 50,000,000		50,000,000
Line of credit, variable rate basis description			LIBOR + 1.40%
Unsecured Term Loan Due October 2023 | Unsecured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.40%
Unsecured Term Loan due July 2024 | Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance			$ 350,000,000		0
Line of credit, variable rate basis description			LIBOR + 1.40%
Unsecured Term Loan due July 2024 | Unsecured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.40%
Unsecured Term Loan, $175 million | Unsecured Term Loan
Debt Instrument [Line Items]
Principal balance	$ 175,000,000
Senior Unsecured Credit Facility | Unsecured credit facility
Debt Instrument [Line Items]
Senior unsecured credit facility			$ 75,000,000.0		0
Maximum borrowing capacity	$ 400,000,000			$ 300,000,000
Senior Unsecured Credit Facility | Unsecured credit facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.45%
Salt Lake City Marriott Downtown | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			4.25%
Principal balance			$ 53,866,000		55,032,000
Westin Washington, D.C. City Center | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			3.99%
Principal balance			$ 61,106,000		62,734,000
The Lodge at Sonoma, a Renaissance Resort and Spa | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			3.96%
Principal balance			$ 27,188,000		27,633,000
Westin San Diego | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			3.94%
Principal balance			$ 62,241,000		63,385,000
Courtyard Manhattan / Midtown East | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			4.40%
Principal balance			$ 81,494,000		82,620,000
Renaissance Worthington | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			3.66%
Principal balance			$ 81,321,000		82,540,000
JW Marriott Denver at Cherry Creek | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			4.33%
Principal balance			$ 61,549,000		62,411,000
Boston Westin | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			4.36%
Principal balance			$ 191,682,000		194,466,000
New Market Tax Credit loan | Mortgages
Debt Instrument [Line Items]
Interest rate, stated percentage			5.17%
Principal balance			$ 2,943,000		$ 2,943,000
Interest Rate Swap | Unsecured Term Loan Due October 2023 | Unsecured Term Loan | LIBOR Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate		2.41%
Interest Rate Swap | Unsecured Term Loan, $175 million | Unsecured Term Loan | LIBOR Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.70%

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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.

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

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

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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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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).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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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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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