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Other Assets (Narrative) (Details)
 12 Months Ended
Jan. 31, 2012
USD ($)
Jan. 31, 2012
USD ($)
loan
Dec. 31, 2011
USD ($)
Dec. 31, 2011
USD ($)
loan
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Deferred financing costs         $ 200,000 $ 300,000
Note receivable         $ 200,000 $ 200,000
Promissory Notes [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Principal amount $ 300 $ 300 $ 300 $ 300    
Number of promissory notes | loan   1   1    
Accrued interest rate (in percent) 4.50%   4.50%      
Notes receivables, maturity date, description         the four year anniversary of the issuance date of the promissory notes, or (ii) an event of default