Debt (New Debt/Refinance Narrative) (Details) - USD ($)							12 Months Ended
	Aug. 10, 2017	Aug. 01, 2017	Feb. 24, 2017	Jan. 31, 2017	Jan. 06, 2017	Jan. 03, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 04, 2019	Sep. 10, 2019	Jul. 25, 2019	Jun. 07, 2019	Apr. 13, 2018	Jan. 31, 2018	Feb. 01, 2017
Extinguishment of Debt Disclosures [Abstract]
Interest rate cap							3.35%
Unamortized deferred costs and defeasance premiums expensed							$ 280,000	$ 22,000	$ 590,000
Annapolis Waterfront Hotel, MD [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount														$ 28,000
Capitol Hill Hotel, Washington, D.C. [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount															$ 25,000,000
$475 Million Senior Unsecured Credit Facility ("Credit Facility") [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment	$ 280,000
Courtyard, LA Westside, Culver City, LA [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment		$ 35,000,000
Unamortized deferred costs and defeasance premiums expensed		$ 32,000
Hilton Garden Inn 52nd Street, New York, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment			$ 45,000,000
Unamortized deferred costs and defeasance premiums expensed			$ 94,000
Ritz-Carlton, Coconut Grove, FL [Member]
Extinguishment of Debt Disclosures [Abstract]
Assumption of Debt																$ 3,150,000
Duane Street Hotel, New York, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment				$ 9,500,000
Unamortized deferred costs and defeasance premiums expensed				$ 12,000
Hyatt House Scottsdale, AZ; Hyatt House Pleasant Hill, CA And Hyatt House Pleasanton, CA [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment					$ 51,428,000
Unamortized deferred costs and defeasance premiums expensed					$ 47,000
Hilton Garden Inn, JFK Airport, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment						$ 21,000,000
Unamortized deferred costs and defeasance premiums expensed						37,000
Mystic Marriott Hotel & Spa, Groton, CT [Member]
Extinguishment of Debt Disclosures [Abstract]
Mortgage loan extinguishment						43,000,000
Unamortized deferred costs and defeasance premiums expensed						$ 84,000
Hilton Garden Inn, 52nd Street, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount										$ 44,325,000
Effective interest rate										3.84%
Senior Unsecured Term Loan Agreement [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount											$ 300,000,000
Credit Facility And Term Loans [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount							700,900,000
Hilton Garden Inn Tribeca, New York, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount												$ 45,000,000
Hyatt Union Square, New York, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount													$ 56,000,000
Interest Rate Swap [Member] | Hilton Garden Inn Tribeca, New York, NY [Member]
Extinguishment of Debt Disclosures [Abstract]
Effective interest rate												4.02%
Revolving Credit Facility [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount							950,900,000
Revolving Credit Facility [Member] | $250 Million Senior Unsecured Revolving Line Of Credit ("Line of Credit") [Member]
Extinguishment of Debt Disclosures [Abstract]
Revolving line of credit, maximum borrowing capacity	250,000,000
Revolving Credit Facility [Member] | $225 Million Senior Unsecured Term Loan ("First Term Loan") [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, face amount	$ 225,000,000						$ 207,000,000
London Interbank Offered Rate (LIBOR) [Member]
Extinguishment of Debt Disclosures [Abstract]
Debt instrument, basis spread on variable rate (in hundredths)							2.65%
London Interbank Offered Rate (LIBOR) [Member] | Annapolis Waterfront Hotel, MD [Member]
Extinguishment of Debt Disclosures [Abstract]
Interest rate cap							6.00%