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Investment Securities (Details 2) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 256,540	$ 26,228
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4,157	228
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15,164	2,737
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	185	40
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	271,704	28,965
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	4,342	268
US Treasury Securities [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,384
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	346
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	15,384
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	346
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	215,705	21,298
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,316	152
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15,164	1,414
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	185	33
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	230,869	22,712
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	3,501	185
Small Business Administration pools [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,296
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	57
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,323
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7,296	1,323
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	57	7
US States and Political Subdivisions Debt Securities [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,992	4,930
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	344	76
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	15,992	4,930
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	344	$ 76
Corporate and other securities [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,163
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	94
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,163
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 94

X

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+ References

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-Name Accounting Standards Codification
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