Commitments and Contingencies (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) agreement	Sep. 30, 2019 USD ($)	Dec. 31, 2019 property	Dec. 31, 2016 agreement
Loss Contingencies [Line Items]
Management fees incurred	$ 253	$ 438	$ 794	$ 1,384
Incentive management fee	0	63	$ 0	140
Management agreement renewal additional term			1 year
Management agreement written notice of termination period			90 days
Cost of goods and services sold	7,334	9,718	$ 22,238	29,266
Office Building [Member]
Loss Contingencies [Line Items]
Number of new leases entered into during period | agreement						3
Lease expense	4	39	$ 22	118
Minimum [Member]
Loss Contingencies [Line Items]
Management fee percent			3.00%
Management agreement term			1 year
Franchise fee percent			3.30%
Other franchiser programs and service fee percent			2.50%
Franchise agreement term			10 years
Maximum [Member]
Loss Contingencies [Line Items]
Management fee percent			3.50%
Incentive fee percent			5.00%
Management agreement term			3 years
Franchise fee percent			5.50%
Other franchiser programs and service fee percent			6.00%
Franchise agreement term			25 years
Land [Member]
Loss Contingencies [Line Items]
Number of land lease agreements related to properties owned | agreement			0
Franchise [Member]
Loss Contingencies [Line Items]
Cost of goods and services sold	$ 657	$ 1,130	$ 1,977	$ 3,360
Number of hotels that dropped below required level of guest satisfaction | property					2