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General (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 25, 2015
Jun. 30, 2016
Jun. 25, 2015
Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]          
Depreciation $ 10,486,000 $ 9,872,000 $ 20,677,000 $ 19,602,000  
Percentage Of Cash Dividends     110.00%    
Available-for-sale Securities, Fair Value Disclosure 70,000   $ 70,000   $ 70,000
Interest Rate Fair Value Hedge Liability at Fair Value $ 17,000   $ 17,000    
Interest Rate Fair Value Hedge Asset at Fair Value         16,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges       319,000  
Accounting Standards Update 2015-03 [Member]          
Summary of Significant Accounting Policies [Line Items]          
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets         $ 404,000
Accounting Standards Update 2015-03 [Member] | Interest Expense [Member]          
Summary of Significant Accounting Policies [Line Items]          
Amortization of Debt Issuance Costs   111,000   $ 219,000  
Fair Value, Inputs, Level 3 [Member] | Hotels Resorts [Member]          
Summary of Significant Accounting Policies [Line Items]          
Impairment of Real Estate   $ 2,600,000