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Derivative Financial Instruments - Schedule of Derivative Instruments (Details) - Cash Flow - Interest-rate swap contracts | Jun. 30, 2018 USD ($) derivative
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Derivative [Line Items] |
Notional | $ 43,000,000
Fixed Rate/Buy Amount (as a percent) | 3.82%
Fair value of interest rate hedge, liabilities | $ (1,706,000)
Number of interest-rate contracts held | derivative | 3

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