Debt Securities - Additional Information (Details) $ in Thousands	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Available for Sale
Debt securities with gross unrealized losses, fair value | $	$ 2,629,923	$ 2,783,177
Gross unrealized losses on debt securities | $	$ 232,553	$ 54,654
Ratio of gross unrealized losses to debt securities with gross unrealized losses	8.80%	2.00%
Count of debt securities | security	1,177	1,252
Count of debt securities in an unrealized loss position | security	881	373
Held to Maturity
Debt securities with gross unrealized losses, fair value | $	$ 876,737
Gross unrealized losses on debt securities | $	$ 76,274
Ratio of gross unrealized losses to debt securities with gross unrealized losses	8.70%
Count of debt securities | security	55
Count of debt securities in an unrealized loss position | security	55
Total
Debt securities with gross unrealized losses, fair value | $	$ 3,506,660	$ 2,783,177
Gross unrealized losses on debt securities | $	$ 308,827	$ 54,654
Ratio of gross unrealized losses to debt securities with gross unrealized losses	8.80%	2.00%
Count of debt securities | security	1,232	1,252
Count of debt securities in an unrealized loss position | security	936	373