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Derivatives - Narrative (Details) - Interest Rate Swap - USD ($)
1 Months Ended 3 Months Ended
Nov. 30, 2018
Apr. 30, 2017
Jun. 30, 2019
Derivative [Line Items]      
Derivative agreement term 5 years 3 years  
Derivative notional amount $ 139,000,000.0 $ 60,000,000.0  
Fixed rate of derivatives (as a percent) 3.09% 1.58%  
Quarterly reduction to notional amount     $ 5,000,000.0