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Notes and Other Receivables (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 22,941 $ 19,285
Bridge loan 3,600 3,100
Secured Due September 2020 [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 4,378 $ 0
Stated interest rate (in hundredths) 10.75% 10.75%
Secured Due December 2016 [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 3,199 $ 3,219
Stated interest rate (in hundredths) 6.00% 6.00%
Notes And Other Receivables From Affiliates [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 3,602 $ 3,092
Other Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 11,762 $ 12,974