Commitments and Contingencies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) item property	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) item
Loss Contingencies [Line Items]
Management fees incurred	$ 1,779,000	$ 1,700,000	$ 1,619,000
Incentive management fee	$ 333,000	306,000	190,000.000
Management agreement renewal additional term	1 year
Management agreement written notice of termination period	90 days
Cost of goods and services sold	$ 41,008,000	37,134,000	37,092,000
Number of hotels that dropped below required level of guest satisfaction | property	2
Number of land lease agreements related to properties owned | item	0
Lease expense	$ 0	9,000	$ 105,000
Number of new leases entered into during period | item			3
Lease income	65,000	71,000	$ 86,000
Employer contribution expense	71,000	67,000	73,000
Office Building [Member]
Loss Contingencies [Line Items]
Annual lease payment		154,000
Lease expense	$ 160,000	154,000	199,000
Restaurant [Member]
Loss Contingencies [Line Items]
Number of real estate properties associated with lease agreements | item	1
Cell Tower [Member]
Loss Contingencies [Line Items]
Number of real estate properties associated with lease agreements | item	1
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
Lease expiration	Dec. 31, 2019
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
Lease expiration	Dec. 31, 2021
Franchise [Member]
Loss Contingencies [Line Items]
Cost of goods and services sold	$ 4,834,000	$ 3,800,000	$ 3,123,000