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Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Accounting Policies [Line Items]      
Deferred Tax Liabilities, Gross $ 475   $ 475
Income Tax Expense (Benefit) 50 $ 122  
Deferred Rent Receivables, Net 13,600   12,900
Reimbursement Revenue 2,100   1,400
Proceeds from Sale of Real Estate 20,000    
Gain (Loss) on Disposition of Assets for Financial Service Operations 4,598 $ 4,742  
Cash in Excess of FDIC Insured Amounts $ 10,200   $ 57,500
Weighted Average Number Diluted Shares Outstanding Adjustment 13,599    
Common Stock, Shares Authorized 45,000,000   45,000,000
Common Stock [Member]      
Accounting Policies [Line Items]      
Share Price $ 48.00    
Common Stock [Member] | Forward Sale Agreement [Member]      
Accounting Policies [Line Items]      
Common Stock, Shares Authorized 3,500,000