Loans (Additional Information) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified as troubled debt restructurings | loan	0	0	0	0
Additional lending amount to customers whose loan terms has been modified in troubled debt restructuring	$ 0		$ 0		$ 0
Number of loans modified as troubled debt restructuring subsequently defaulted | loan	0	0	0	0
Threshold amount to individually classify loans by credit risk	$ 250,000		$ 250,000
Carrying amount of consumer mortgage loans secured by residential real estate properties	10,000		10,000		$ 58,000
Loans Acquired With Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in allowance for loan losses	147,000	$ 0	424,000	$ 30,000
Reversal of allowance for loan losses	$ 0	$ 3,000	$ 0	$ 3,000