Borrowings - Components (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Borrowings
Total borrowings	$ 181,439	$ 195,453
Lines of credit
Borrowings
Total borrowings	6,540	33,150
Short-term subordinated debt
Borrowings
Total borrowings	12,200	10,582
FHLB advances
Borrowings
Total borrowings	$ 162,699	$ 151,721