Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic management fees incurred
Continuing operations - property general and administrative expense, and corporate overhead expense	$ 31,485,000	$ 25,218,000	$ 22,807,000
Discontinued operations		65,000	2,061,000
Total basic management fees	31,485,000	25,283,000	24,868,000
Incentive management fees incurred
Continuing operations - property general and administrative expense	4,034,000	3,025,000	2,738,000
Discontinued operations			587,000
Total incentive management fees	4,034,000	3,025,000	3,325,000
License and Franchise Agreements
Continuing operations - franchise costs	38,271,000	32,932,000	30,067,000
Discontinued operations		73,000	2,996,000
License and franchise costs incurred	38,271,000	33,005,000	33,063,000
Royalty expense	11,600,000	10,800,000	10,600,000
Minimum
Management Agreements
Basic management fees (as a percent)	2.00%
Maximum
Management Agreements
Basic management fees (as a percent)	3.50%
Renovation and Construction Commitments
Renovation and Construction Commitments
Remaining construction commitments	$ 56,500,000