Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	118	30
Fair Value, Less Than 12 Months	$ 870,990	$ 372,499
Unrealized Losses, Less Than 12 Months	$ (52,169)	$ (5,393)
Number of Securities, 12 Months or More \| security	6	1
Fair Value, 12 Months or More	$ 70,648	$ 8,933
Unrealized Losses, 12 Months or More	$ (10,896)	$ (374)
Number of Securities, Total \| security	124	31
Fair Value, Total	$ 941,638	$ 381,432
Unrealized Losses, Total	$ (63,065)	$ (5,767)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Number of Securities, Less Than 12 Months \| security	12	8
Fair Value, Less Than 12 Months	$ 116,707	$ 85,221
Unrealized Losses, Less Than 12 Months	$ (9,693)	$ (742)
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	12	8
Fair Value, Total	$ 116,707	$ 85,221
Unrealized Losses, Total	$ (9,693)	$ (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	$ 47,817	$ 0
Unrealized Losses, Less Than 12 Months	$ (734)	$ 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	$ 47,817	$ 0
Unrealized Losses, Total	$ (734)	$ 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	48	12
Fair Value, Less Than 12 Months	$ 352,393	$ 141,204
Unrealized Losses, Less Than 12 Months	$ (24,035)	$ (2,436)
Number of Securities, 12 Months or More \| security	4	1
Fair Value, 12 Months or More	$ 34,282	$ 8,933
Unrealized Losses, 12 Months or More	$ (5,531)	$ (374)
Number of Securities, Total \| security	52	13
Fair Value, Total	$ 386,675	$ 150,137
Unrealized Losses, Total	$ (29,566)	$ (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	12	3
Fair Value, Less Than 12 Months	$ 9,479	$ 46,042
Unrealized Losses, Less Than 12 Months	$ (527)	$ (628)
Number of Securities, 12 Months or More \| security	2	0
Fair Value, 12 Months or More	$ 36,366	$ 0
Unrealized Losses, 12 Months or More	$ (5,365)	$ 0
Number of Securities, Total \| security	14	3
Fair Value, Total	$ 45,845	$ 46,042
Unrealized Losses, Total	$ (5,892)	$ (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	36	7
Fair Value, Less Than 12 Months	$ 323,896	$ 100,032
Unrealized Losses, Less Than 12 Months	$ (16,701)	$ (1,587)
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	36	7
Fair Value, Total	$ 323,896	$ 100,032
Unrealized Losses, Total	$ (16,701)	$ (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	2	0
Fair Value, Less Than 12 Months	$ 20,198	$ 0
Unrealized Losses, Less Than 12 Months	$ (479)	$ 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	2	0
Fair Value, Total	$ 20,198	$ 0
Unrealized Losses, Total	$ (479)	$ 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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