Commitments and Contingencies - Schedule of borrowings and contractual obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
FHLB advances—short-term	$ 20,000	$ 30,000
Other borrowings short-term	3,962	0
Total	$ 23,962	$ 30,000