Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities, Aggregated By Earlier of Guaranteed Call Date or Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Within One Year, Amortized Cost	$ 12
Available for sale securities, Within One Year, Fair Value	12
Available for sale securities, After One, But Within Five Years, Amortized Cost	14,991
Available for sale securities, After One, But Within Five Years, Fair Value	14,943
Available for sale securities, After Five, But Within Ten Years, Amortized Cost	62,712
Available for sale securities, After Five, But Within Ten Years, Fair Value	63,242
Available for sale securities, After Ten Years, Amortized Cost	134,275
Available for sale securities, After Ten Years, Fair Value	134,069
Available for sale securities, Total, Amortized Cost	211,990
Available for sale securities, Total, Fair Value	212,266
Held to maturity securities, Within One Year, Amortized Cost	8,861
Held to maturity securities, Within One Year, Fair Value	8,983
Held to maturity securities, After One, But Within Five Years, Amortized Cost	21,995
Held to maturity securities, After One, But Within Five Years, Fair Value	22,843
Held to maturity securities, After Five, But Within Ten Years, Amortized Cost	99,832
Held to maturity securities, After Five, But Within Ten Years, Fair Value	105,298
Held to maturity securities, After Ten Years, Amortized Cost	362,094
Held to maturity securities, After Ten Years, Fair Value	362,761
Held to maturity securities, Amortized Cost	492,782	$ 247,672
Held to maturity securities, Fair Value	499,885	260,139
Available for sale securities and Held to maturity securities, Within One Year, Amortized Cost	8,873
Available for sale securities and Held to maturity securities, Within One Year, Fair Value	8,995
Available for sale securities and Held to maturity securities, After One, But Within Five Years, Amortized Cost	36,986
Available for sale securities and Held to maturity securities, After One, But Within Five Years, Fair Value	37,786
Available for sale securities and Held to maturity securities, After Five, But Within Ten Years, Amortized Cost	162,544
Available for sale securities and Held to maturity securities, After Five, But Within Ten Years, Fair Value	168,540
Available for sale securities and Held to maturity securities, After Ten Years, Amortized Cost	496,369
Available for sale securities and Held to maturity securities, After Ten Years, Fair Value	496,830
Available for sale securities and Held to maturity securities, Total, Amortized Cost	704,772
Available for sale securities and Held to maturity securities, Total, Fair Value	712,151
U.S. Government Sponsored Enterprise Obligations
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, After One, But Within Five Years, Amortized Cost	9,996
Available for sale securities, After One, But Within Five Years, Fair Value	9,837
Available for sale securities, After Five, But Within Ten Years, Amortized Cost	5,000
Available for sale securities, After Five, But Within Ten Years, Fair Value	5,123
Available for sale securities, After Ten Years, Amortized Cost	8,000
Available for sale securities, After Ten Years, Fair Value	8,455
Available for sale securities, Total, Amortized Cost	22,996
Available for sale securities, Total, Fair Value	23,415
Mortgage Backed Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Within One Year, Amortized Cost	12
Available for sale securities, Within One Year, Fair Value	12
Available for sale securities, After One, But Within Five Years, Amortized Cost	3,253
Available for sale securities, After One, But Within Five Years, Fair Value	3,327
Available for sale securities, After Five, But Within Ten Years, Amortized Cost	57,712
Available for sale securities, After Five, But Within Ten Years, Fair Value	58,119
Available for sale securities, After Ten Years, Amortized Cost	126,275
Available for sale securities, After Ten Years, Fair Value	125,614
Available for sale securities, Total, Amortized Cost	187,252
Available for sale securities, Total, Fair Value	187,072
Held to maturity securities, After One, But Within Five Years, Amortized Cost	2
Held to maturity securities, After One, But Within Five Years, Fair Value	2
Held to maturity securities, After Five, But Within Ten Years, Amortized Cost	60,048
Held to maturity securities, After Five, But Within Ten Years, Fair Value	63,159
Held to maturity securities, After Ten Years, Amortized Cost	319,676
Held to maturity securities, After Ten Years, Fair Value	319,448
Held to maturity securities, Amortized Cost	379,726
Held to maturity securities, Fair Value	382,609
Corporate Debt Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, After One, But Within Five Years, Amortized Cost	1,742
Available for sale securities, After One, But Within Five Years, Fair Value	1,779
Available for sale securities, Total, Amortized Cost	1,742
Available for sale securities, Total, Fair Value	1,779
Held to maturity securities, Within One Year, Amortized Cost	4,497
Held to maturity securities, Within One Year, Fair Value	4,552
Held to maturity securities, After One, But Within Five Years, Amortized Cost	2,496
Held to maturity securities, After One, But Within Five Years, Fair Value	2,551
Held to maturity securities, Amortized Cost	6,993
Held to maturity securities, Fair Value	7,103
Municipal Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Within One Year, Amortized Cost	4,364
Held to maturity securities, Within One Year, Fair Value	4,431
Held to maturity securities, After One, But Within Five Years, Amortized Cost	19,497
Held to maturity securities, After One, But Within Five Years, Fair Value	20,290
Held to maturity securities, After Five, But Within Ten Years, Amortized Cost	39,784
Held to maturity securities, After Five, But Within Ten Years, Fair Value	42,139
Held to maturity securities, After Ten Years, Amortized Cost	42,418
Held to maturity securities, After Ten Years, Fair Value	43,313
Held to maturity securities, Amortized Cost	106,063	103,248
Held to maturity securities, Fair Value	$ 110,173	$ 108,831

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