Marketable Securities - Credit Quality of Held To Maturity Securities (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	$ 784,208
Mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	659,748
U.S. government and agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	124,460
AA+
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	784,208
AA+ | Mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	659,748
AA+ | U.S. government and agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	$ 124,460