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Investment Securities - Summary of Available-for-sale Securities By Maturity (Details) - U.S. Treasury securities
$ in Thousands
Jun. 30, 2026
USD ($)
Amortized Cost  
Within one year $ 29,921
After one but within five years 23,655
Total securities at amortized cost 53,576
Fair Value  
Within one year 29,969
After one but within five years 23,706
Total securities at fair value $ 53,675
Weighted Average Yield  
Within one year 4.23%
After one but within five years 4.30%