Fair Value of Assets and Liabilities - Schedule of Gains and Losses Resulting from Nonrecurring Fair Value Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	$ 299	$ 500	$ 893	$ (46)
Loans measured for impairment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	299	600	893	220
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	$ 0	$ (100)	$ 0	$ (266)