Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	130	30
Fair Value, Less Than 12 Months	$ 762,701	$ 372,499
Unrealized Losses, Less Than 12 Months	$ (61,239)	$ (5,393)
Number of Securities, 12 Months or More \| security	21	1
Fair Value, 12 Months or More	$ 223,400	$ 8,933
Unrealized Losses, 12 Months or More	$ (43,374)	$ (374)
Number of Securities, Total \| security	151	31
Fair Value, Total	$ 986,101	$ 381,432
Unrealized Losses, Total	$ (104,613)	$ (5,767)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	9	8
Fair Value, Less Than 12 Months	$ 83,694	$ 85,221
Unrealized Losses, Less Than 12 Months	$ (8,943)	$ (742)
Number of Securities, 12 Months or More \| security	4	0
Fair Value, 12 Months or More	$ 37,130	$ 0
Unrealized Losses, 12 Months or More	$ (5,786)	$ 0
Number of Securities, Total \| security	13	8
Fair Value, Total	$ 120,824	$ 85,221
Unrealized Losses, Total	$ (14,729)	$ (742)
Obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	7	0
Fair Value, Less Than 12 Months	$ 46,784	$ 0
Unrealized Losses, Less Than 12 Months	$ (1,731)	$ 0
Number of Securities, 12 Months or More \| security	0	0
Fair Value, 12 Months or More	$ 0	$ 0
Unrealized Losses, 12 Months or More	$ 0	$ 0
Number of Securities, Total \| security	7	0
Fair Value, Total	$ 46,784	$ 0
Unrealized Losses, Total	$ (1,731)	$ 0
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	52	12
Fair Value, Less Than 12 Months	$ 353,504	$ 141,204
Unrealized Losses, Less Than 12 Months	$ (35,910)	$ (2,436)
Number of Securities, 12 Months or More \| security	7	1
Fair Value, 12 Months or More	$ 66,215	$ 8,933
Unrealized Losses, 12 Months or More	$ (15,306)	$ (374)
Number of Securities, Total \| security	59	13
Fair Value, Total	$ 419,719	$ 150,137
Unrealized Losses, Total	$ (51,216)	$ (2,810)
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	26	3
Fair Value, Less Than 12 Months	$ 7,459	$ 46,042
Unrealized Losses, Less Than 12 Months	$ (686)	$ (628)
Number of Securities, 12 Months or More \| security	3	0
Fair Value, 12 Months or More	$ 34,337	$ 0
Unrealized Losses, 12 Months or More	$ (7,958)	$ 0
Number of Securities, Total \| security	29	3
Fair Value, Total	$ 41,796	$ 46,042
Unrealized Losses, Total	$ (8,644)	$ (628)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	30	7
Fair Value, Less Than 12 Months	$ 237,751	$ 100,032
Unrealized Losses, Less Than 12 Months	$ (12,757)	$ (1,587)
Number of Securities, 12 Months or More \| security	7	0
Fair Value, 12 Months or More	$ 85,718	$ 0
Unrealized Losses, 12 Months or More	$ (14,324)	$ 0
Number of Securities, Total \| security	37	7
Fair Value, Total	$ 323,469	$ 100,032
Unrealized Losses, Total	$ (27,081)	$ (1,587)
Corporate obligations
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	1	0
Fair Value, Less Than 12 Months	$ 500	$ 0
Unrealized Losses, Less Than 12 Months	$ 0	$ 0
Number of Securities, 12 Months or More \| security	0	0
Fair Value, 12 Months or More	$ 0	$ 0
Unrealized Losses, 12 Months or More	$ 0	$ 0
Number of Securities, Total \| security	1	0
Fair Value, Total	$ 500	$ 0
Unrealized Losses, Total	$ 0	$ 0
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	5	0
Fair Value, Less Than 12 Months	$ 33,009	$ 0
Unrealized Losses, Less Than 12 Months	$ (1,212)	$ 0
Number of Securities, 12 Months or More \| security	0	0
Fair Value, 12 Months or More	$ 0	$ 0
Unrealized Losses, 12 Months or More	$ 0	$ 0
Number of Securities, Total \| security	5	0
Fair Value, Total	$ 33,009	$ 0
Unrealized Losses, Total	$ (1,212)	$ 0

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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