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Investment Securities - Amortized cost and estimated fair value (Details)
$ in Thousands
Jun. 30, 2021
USD ($)
Carrying Value  
Due within one year or less $ 5,141
Due after one year through five years 28,706
Due after five years through ten years 76,714
Due after 10 years 35,755
Total investment securities 146,316
Estimated Fair Value  
Due within one year or less 5,142
Due after one year through five years 28,745
Due after five years through ten years 77,812
Due after 10 years 36,586
Total investment securities 148,285
Amortized Cost  
Due after one year through five years 3,001
Due after five years through ten years 86,721
Due after 10 years 559,605
Total investment securities available-for-sale 649,327
Fair Value  
Due after one year through five years 3,100
Due after five years through ten years 89,886
Due after 10 years 558,560
Total investment securities available-for-sale $ 651,546