Debt Securities Held to Maturity - Continuous Unrealized Loss Position of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Less Than 12 Months
Fair Value	$ 123,147	$ 2,176
Gross Unrealized (Losses)	(1,686)	(2)
12 Months or Longer
Fair Value	0	0
Gross Unrealized (Losses)	0	0
Total
Fair Value	123,147	2,176
Gross Unrealized (Losses)	(1,686)	(2)
U.S. government and agency obligations
Less Than 12 Months
Fair Value	44,111
Gross Unrealized (Losses)	(759)
12 Months or Longer
Fair Value	0
Gross Unrealized (Losses)	0
Total
Fair Value	44,111
Gross Unrealized (Losses)	(759)
Mortgage-backed securities and collateralized mortgage obligations
Less Than 12 Months
Fair Value	79,036	2,176
Gross Unrealized (Losses)	(927)	(2)
12 Months or Longer
Fair Value	0	0
Gross Unrealized (Losses)	0	0
Total
Fair Value	79,036	2,176
Gross Unrealized (Losses)	$ (927)	$ (2)

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
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

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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
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563

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