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Securities Available-for-Sale (Details) - Investments classified by maturity date - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities Available-for-Sale:
Due in one year or less, amortized cost	$ 4,309
Due in one year or less, fair value	4,333
Due after one year through five years, amortized cost	28,344
Due after one year through five years, fair value	28,503
Due after five years through ten years, amortized cost	24,060
Due after five years through ten years, fair value	24,757
Due after ten years, amortized cost	142,284
Due after ten years, fair value	145,092
Total, amortized cost	421,661	$ 419,947
Total, fair value	425,849
Residential mortgage pass-through securities [Member]
Securities Available-for-Sale:
Total, amortized cost	215,378	189,721
Total, fair value	215,804
Commercial mortgage pass-through securities [Member]
Securities Available-for-Sale:
Total, amortized cost	5,017	3,919
Total, fair value	5,091
Other securities [Member]
Securities Available-for-Sale:
Total, amortized cost	2,269	$ 2,990
Total, fair value	$ 2,269

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