v3.26.3
Marketable Securities - Available for Sale, by Contractual Maturity (Details) - Mortgage-backed securities
$ in Thousands
Sep. 30, 2026
USD ($)
Amortized cost  
Due within one year $ 15
Due after one year through five years 11,405
Due after five years through ten years 21,507
Due after ten years 1,714,903
Total mortgage-backed securities 1,747,830
Fair value  
Due within one year 15
Due after one year through five years 10,672
Due after five years through ten years 20,714
Due after ten years 1,516,374
Total mortgage-backed securities $ 1,547,775