Debt Securities - Credit Quality Indicators for HTM Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 3,715,052	$ 1,199,164
Municipal Bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	1,682,640	1,199,164
Moody's, Aaa Rating | Standard & Poor's, AAA Rating | Internal Investment Grade | Municipal Bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	430,542	316,899
Moody's, Aa1, Aa2 or Aa3 Ratings | Standard & Poor's, AA+, AA or AA- Ratings | Internal Investment Grade | Municipal Bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	1,206,441	841,616
Moody's, A1, A2 or A3 Ratings | Standard & Poor's, A+, A or A- Ratings | Internal Investment Grade | Municipal Bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	37,162	39,078
Moody's, Not Rated | Standard & Poor's, Not Rated | Internal Investment Grade | Municipal Bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 8,495	$ 1,571