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SECURITIES - Amortized Cost and Fair Value By Contractual Maturity, Available-for-sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Available-for-sale, Amortized Cost    
Within one year $ 11,050  
One to five years 269,229  
Five to ten years 175,926  
Beyond ten years 5,145  
Pass-through MBS issued by GSEs and Agency CMO 587,588  
Amortized Cost 1,048,938 $ 1,071,858
Available for sale, Fair Value    
Within one year 10,679  
One to five years 251,440  
Five to ten years 146,950  
Beyond ten years 4,275  
Pass-through MBS issued by GSEs and Agency CMO 513,468  
Total Fair Value $ 926,812 $ 950,587