Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Amortized cost
One year or less	$ 275,564
After one through five years	485,634
After five through ten years	109,970
After ten years	79,102
Allocated and single maturity date, total	950,270
Fair value
One year or less	273,203
After one through five years	467,441
After five through ten years	98,168
After ten years	68,139
Allocated and single maturity date, total	906,951
Amortized Cost
One year or less	11,281
After one through five years	34,624
After five through ten years	4,945
After ten years	1,225
Allocated and single maturity date, total	52,075
Fair Value
One year or less	11,273
After one through five years	34,476
After five through ten years	4,900
After ten years	1,225
Allocated and single maturity date, total	$ 51,874