Fair Value of Assets and Liabilities - Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Recurring measurements
Financial Assets
Loans held for sale, at fair value	$ 12,314	$ 60,797
Total assets measured at fair value on a recurring basis	5,327,740	9,235,588
Financial Liabilities
Total financial liabilities	188	80
Interest rate caps \| Recurring measurements
Financial Assets
Interest rate caps	7,757	934
Interest rate locks \| Recurring measurements
Financial Assets
Interest rate caps	362	3,008
TBA hedge
Financial Liabilities
TBA hedge
TBA hedge \| Recurring measurements
Financial Liabilities
TBA hedge	188	80
U.S. government and federal agency \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	444,727	1,346,749
U.S. government sponsored enterprises \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	287,364	240,693
State and local governments \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	132,993	488,858
Corporate bonds \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	26,109	180,752
Residential mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	3,267,341	5,699,659
Commercial mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	1,148,773	1,214,138
Level 1 \| Recurring measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Financial Liabilities
Total financial liabilities	0	0
Level 1 \| Interest rate caps \| Recurring measurements
Financial Assets
Interest rate caps		0
Level 1 \| Interest rate locks \| Recurring measurements
Financial Assets
Interest rate caps	0	0
Level 1 \| TBA hedge \| Recurring measurements
Financial Liabilities
TBA hedge	0	0
Level 1 \| U.S. government and federal agency \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 \| U.S. government sponsored enterprises \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 \| State and local governments \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 \| Corporate bonds \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 \| Residential mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 \| Commercial mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 2 \| Recurring measurements
Financial Assets
Loans held for sale, at fair value	12,314	60,797
Total assets measured at fair value on a recurring basis	5,327,740	9,235,588
Financial Liabilities
Total financial liabilities	188	80
Level 2 \| Interest rate caps \| Recurring measurements
Financial Assets
Interest rate caps	7,757	934
Level 2 \| Interest rate locks \| Recurring measurements
Financial Assets
Interest rate caps	362	3,008
Level 2 \| TBA hedge \| Recurring measurements
Financial Liabilities
TBA hedge	188	80
Level 2 \| U.S. government and federal agency \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	444,727	1,346,749
Level 2 \| U.S. government sponsored enterprises \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	287,364	240,693
Level 2 \| State and local governments \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	132,993	488,858
Level 2 \| Corporate bonds \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	26,109	180,752
Level 2 \| Residential mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	3,267,341	5,699,659
Level 2 \| Commercial mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	1,148,773	1,214,138
Level 3 \| Recurring measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Financial Liabilities
Total financial liabilities	0	0
Level 3 \| Interest rate caps \| Recurring measurements
Financial Assets
Interest rate caps		0
Level 3 \| Interest rate locks \| Recurring measurements
Financial Assets
Interest rate caps	0	0
Level 3 \| TBA hedge \| Recurring measurements
Financial Liabilities
TBA hedge	0	0
Level 3 \| U.S. government and federal agency \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 \| U.S. government sponsored enterprises \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 \| State and local governments \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 \| Corporate bonds \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 \| Residential mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 \| Commercial mortgage-backed securities \| Recurring measurements
Financial Assets
Debt securities, available-for-sale	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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