Debt - Additional Information (Details)				9 Months Ended
	Mar. 16, 2020 USD ($)	Dec. 31, 2019 USD ($) Loan	Jul. 25, 2017 USD ($) Loan	Sep. 30, 2021 USD ($) Loan Hotel_Property	Mar. 01, 2021	Dec. 31, 2020 USD ($)
Debt Details [Line Items]
Outstanding debt				$ 1,372,421,000		$ 1,488,570,000
2017 $85 Million Unsecured Term Loan Facility [Member]
Debt Details [Line Items]
Number of term loans | Loan			1
Debt instrument, face amount			$ 85,000,000
Debt instrument, maturity date			Jul. 25, 2024
Debt instrument, description of variable rate basis				one-month LIBOR
2019 $85 Million Unsecured Term Loan Facility [Member]
Debt Details [Line Items]
Number of term loans | Loan		1
Debt instrument, face amount		$ 85,000,000
Debt instrument, maturity date		Dec. 31, 2029
Debt instrument, description of variable rate basis				one-month LIBOR
$50 Million Senior Notes [Member]
Debt Details [Line Items]
Debt instrument, face amount	$ 50,000,000
Debt instrument, maturity date	Mar. 31, 2030
Mortgage Debt [Member]
Debt Details [Line Items]
Debt instrument, maturity date, description				maturity dates ranging from August 2022 to May 2038
Outstanding debt				$ 502,400,000
Number of hotel properties used to secure debt | Hotel_Property				28
Mortgage Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				3.00%
Minimum [Member] | 2017 $85 Million Unsecured Term Loan Facility [Member] | LIBOR Interest Rate Margin [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				1.30%
Minimum [Member] | 2019 $85 Million Unsecured Term Loan Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				1.70%
Minimum [Member] | $50 Million Senior Notes [Member]
Debt Details [Line Items]
Note payable, fixed annual interest rate				3.60%
Minimum [Member] | Mortgage Debt [Member]
Debt Details [Line Items]
Note payable, fixed annual interest rate				3.40%
Effective interest rates				3.40%
Maximum [Member] | 2017 $85 Million Unsecured Term Loan Facility [Member] | LIBOR Interest Rate Margin [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				2.10%
Maximum [Member] | 2019 $85 Million Unsecured Term Loan Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				2.55%
Maximum [Member] | $50 Million Senior Notes [Member]
Debt Details [Line Items]
Note payable, fixed annual interest rate				4.35%
Maximum [Member] | Mortgage Debt [Member]
Debt Details [Line Items]
Note payable, fixed annual interest rate				5.00%
Effective interest rates				4.97%
Line of Credit [Member]
Debt Details [Line Items]
Loan amendment description				As a result of COVID-19 and the associated disruption to the Company’s operating results, the Company entered into amendments in June 2020 that suspended the testing of the Company’s existing financial maintenance covenants under the unsecured credit facilities. These amendments imposed certain restrictions regarding the Company’s investing and financing activities that were applicable during a specified waiver period, including, but not limited to, limitations on the acquisition of property, payment of distributions to shareholders, capital expenditures and use of proceeds from the sale of property or common shares of the Company, that applied during such testing suspension period. On March 1, 2021, as a result of the continued disruption from COVID-19 and the related uncertainty with respect to the Company’s future operating results, the Company entered into further amendments to each of the unsecured credit facilities (the “March 2021 amendments”) to extend the covenant waiver period for all but two of the Company’s existing financial maintenance covenants until the date that the compliance certificate was required to be delivered for the fiscal quarter ending June 30, 2022 (unless the Company elected an earlier date) (the “Extended Covenant Waiver Period”). The testing for the Minimum Fixed Charge Coverage Ratio and the Minimum Unsecured Interest Coverage Ratio was suspended until the compliance certificate was required to be delivered for the fiscal quarter ending March 31, 2022 (unless the Company elected an earlier date).
Unsecured Credit Facility
Debt Details [Line Items]
Maximum consolidated leverage ratio for first two fiscal quarters					8.50
Maximum consolidated leverage ratio for third and fourth fiscal quarters					8.00
Maximum consolidated leverage ratio for fifth fiscal quarters					7.50
Maximum consolidated leverage ratio thereafter					6.50
Minimum fixed charge coverage ratio for fiscal quarter one					1.05
Minimum fixed charge coverage ratio for fiscal quarter two					1.25
Minimum fixed charge coverage ratio for fiscal quarter thereafter					1.50
Minimum unsecured interest coverage ratio for fiscal quarter one					1.25
Minimum unsecured interest coverage ratio for fiscal quarter two					1.50
Minimum unsecured interest coverage ratio for fiscal quarter three					1.75
Minimum unsecured interest coverage ratio for fiscal quarter thereafter					2.00
Percentage of maximum unsecured leverage ratio for two fiscal quarter					65.00%
Percentage of maximum unsecured leverage ratio for thereafter					60.00%
$850 Million Unsecured Credit Facility [Member]
Debt Details [Line Items]
Line of credit facility, maximum borrowing capacity				$ 850,000,000
Debt instrument, description of variable rate basis				one-month LIBOR
$850 Million Unsecured Credit Facility [Member] | $425 Million Unsecured Revolving Credit Facility [Member]
Debt Details [Line Items]
Line of credit facility, maximum borrowing capacity				$ 425,000,000
Line of credit facility, expiration date				Jul. 27, 2022
Debt instrument, maturity date, description				maturity date may be extended up to one year
Debt instrument extended maturity date term				1 year
Line of credit facility, remaining borrowing capacity				$ 425,000,000
$850 Million Unsecured Credit Facility [Member] | Million 425 Unsecured Term Loan Facility [Member]
Debt Details [Line Items]
Term loan facility, maximum borrowing capacity				$ 425,000,000
Number of term loans | Loan				2
$850 Million Unsecured Credit Facility [Member] | Million 425 Unsecured Term Loan Facility [Member] | $200 Million Unsecured Term Loan [Member]
Debt Details [Line Items]
Debt instrument, face amount				$ 200,000,000
Debt instrument, maturity date				Jul. 27, 2023
$850 Million Unsecured Credit Facility [Member] | Million 425 Unsecured Term Loan Facility [Member] | $225 Million Unsecured Term Loan [Member]
Debt Details [Line Items]
Debt instrument, face amount				$ 225,000,000
Debt instrument, maturity date				Jan. 31, 2024
$850 Million Unsecured Credit Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				1.35%
$850 Million Unsecured Credit Facility [Member] | Minimum [Member] | $425 Million Unsecured Revolving Credit Facility [Member]
Debt Details [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.20%
$850 Million Unsecured Credit Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				2.25%
$850 Million Unsecured Credit Facility [Member] | Maximum [Member] | $425 Million Unsecured Revolving Credit Facility [Member]
Debt Details [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.25%
$225 Million Unsecured Term Loan Facility [Member]
Debt Details [Line Items]
Term loan facility, maximum borrowing capacity				$ 225,000,000
Debt instrument, description of variable rate basis				one-month LIBOR
$225 Million Unsecured Term Loan Facility [Member] | $50 Million Unsecured Term Loan [Member]
Debt Details [Line Items]
Debt instrument, face amount				$ 50,000,000
Debt instrument, maturity date				Aug. 02, 2023
$225 Million Unsecured Term Loan Facility [Member] | $175 Million Unsecured Term Loan [Member]
Debt Details [Line Items]
Debt instrument, face amount				$ 175,000,000
Debt instrument, maturity date				Aug. 02, 2025
$225 Million Unsecured Term Loan Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				1.35%
$225 Million Unsecured Term Loan Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Details [Line Items]
Debt instrument, basis spread on variable rate				2.50%