Long-Term Borrowings - Components (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Long-term borrowings
Finance lease liabilities	$ 19	$ 19
Long-term borrowings	$ 200,019	$ 200,019
Finance lease obligation, annual interest rate	6.78%	6.78%
Short-term FHLB fixed-rate advance:
Long-term borrowings
Long-term borrowings	$ 200,000	$ 200,000
Remaining borrowing capacity	$ 1,800,000	$ 1,700,000
Weighted average interest rate	2.73%	2.73%