Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Limit on stop-loss insurance	1 year
Stop-loss insurance limit per covered individual per year	$ 175,000
Loans repurchased in 2 year interval | loan	1
Total unfunded commitments	$ 352,700,000	$ 308,800,000
Reserve for unfunded loan commitments and letters of credit	$ 152,000	$ 130,000