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