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Derivatives - Rate Cap Transaction narrative (Details) - Not Designated as Hedging Instrument [Member] - Interest rate cap [Member]
3 Months Ended
Sep. 30, 2015
USD ($)
derivative_instrument
Derivative [Line Items]  
Number of derivative instruments | derivative_instrument 1
Notional amount $ 10,000,000
Premium paid 70,000
Fair value $ 35,000
3-Month LIBOR  
Derivative [Line Items]  
Strike rate 2.00%
Operating Expenses [Member]  
Derivative [Line Items]  
Change in fair value of derivative $ 35,000