Marketable Securities - Available-for-sale, by Contractual Maturity (Details) - Residential mortgage-backed securities $ in Thousands	Dec. 31, 2022 USD ($)
Marketable Securities, Available-for-sale [Line Items]
Due within one year	$ 132
Due after one year through five years	32,192
Due after five years through ten years	46,188
Due after ten years	1,092,262
Total residential mortgage-backed securities	1,170,774
Fair value
Due in less than one year	130
Due after one year through five years	29,538
Due after five years through ten years	43,438
Due after ten years	920,465
Total residential mortgage-backed securities	$ 993,571

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