Derivatives - Schedule of Pre-tax Effect of Hedging Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Interest expense	$ 1,970	$ 1,566	$ 5,411	$ 4,543
Reclassifications Out of Accumulated Other Comprehensive (Loss) Income | Gains on derivative instruments: | Interest Rate Contract
Derivative [Line Items]
Interest expense	(74)	(4)	(176)	(4)
Designated as Hedging Instrument | Reclassifications Out of Accumulated Other Comprehensive (Loss) Income | Gains on derivative instruments: | Interest Rate Contract
Derivative [Line Items]
Interest expense	74	4	176	4
Cash Flow Hedging | Interest rate swaps
Derivative [Line Items]
Unrealized holding gains on derivatives arising during the period	$ 35	$ (11)	$ 434	$ (134)