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Debt (Narrative) (Detail 2) - USD ($)
$ in Thousands
1 Months Ended
Jun. 30, 2011
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Line Items]      
Mortgage payable   $ 2,763 $ 2,960
Mortgage      
Debt Instrument [Line Items]      
Mortgage payable $ 3,947    
Mortgage payable, amortization period 20 years    
Debt interest rate   4.92%