Contingencies (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Oct. 17, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($)
Contingencies [Abstract]
Provision for loss reimbursement on sold loans	$ 30	$ 50	$ 180	$ 80
Reserve for loss reimbursement on sold mortgage loans	$ 850		$ 850			$ 780
VISA Class B Common Stock [Member]
Investment Owned [Abstract]
Number of shares owned (in shares) | shares	12,566		12,566
Current conversion ratio			1.6228
VISA Class B Common Stock [Member] | Subsequent Event [Member]
Investment Owned [Abstract]
Closing price (in dollars per share) | $ / shares					$ 177.94
Current value of shares owned					$ 3,600