Long-Term Borrowings - Components (Details) - USD ($) $ in Thousands	1 Months Ended
	Nov. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Long-term borrowings
Finance lease liabilities		$ 0	$ 10
Long-term borrowings		0	$ 200,010
Long-term borrowings			6.78%
FHLB fixed-rate advances
Long-term borrowings
Undrawn line of credit		1,800,000
Debt instrument, fee	$ 9,000
Available remaining borrowing capacity			$ 2,000,000
Federal Reserve Bank line of credit
Long-term borrowings
Undrawn line of credit		$ 1,100,000
FHLB fixed-rate advances
Long-term borrowings
Long-term borrowings			$ 200,000
Long-term borrowings terminated	$ 200,000
Interest rate (as a percent)	2.73%	2.73%	2.73%