Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value		$ 37,845
Less than 12 months, Gross unrealized (losses)		(317)
12 months or longer, Fair value		772
12 months or longer, Gross unrealized (losses)		(8)
Total, Fair value		38,617
Total, Gross unrealized (losses)		(325)
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value		9,934
Less than 12 months, Gross unrealized (losses)		(66)
12 months or longer, Fair value		0
12 months or longer, Gross unrealized (losses)		0
Total, Fair value		9,934
Total, Gross unrealized (losses)		(66)
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	$ 2,695	27,911
Less than 12 months, Gross unrealized (losses)	(6)	(251)
12 months or longer, Fair value	1,883	772
12 months or longer, Gross unrealized (losses)	(25)	(8)
Total, Fair value	4,578	28,683
Total, Gross unrealized (losses)	$ (31)	$ (259)

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
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-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months.

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