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Deposits (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Deposits
Deposits	$ 1,904,282	$ 1,855,516
Average balance, deposits	$ 1,895,680	$ 1,711,092
Deposits, weighted average interest rate during the period	0.20%	0.52%
Non-interest-bearing transaction accounts
Deposits
Deposits	$ 526,047	$ 472,818
Average balance, deposits	$ 523,368	$ 412,825
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits
Deposits	$ 517,248	$ 503,992
Average balance, deposits	$ 509,709	$ 392,576
Deposits, weighted average interest rate during the period	0.20%	0.37%
Money market accounts
Deposits
Deposits	$ 728,751	$ 641,504
Average balance, deposits	$ 674,858	$ 651,402
Deposits, weighted average interest rate during the period	0.17%	0.44%
Certificates of deposit
Deposits
Deposits	$ 57,598	$ 64,694
Average balance, deposits	$ 48,540	$ 111,698
Deposits, weighted average interest rate during the period	0.99%	1.97%
Wholesale deposits
Deposits
Deposits	$ 74,638	$ 172,508
Average balance, deposits	$ 139,205	$ 142,591
Deposits, weighted average interest rate during the period	0.79%	1.71%

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- Definition

Average Balance, Deposits

+ References

No definition available.

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- Definition

[Line Items] for Deposit [Table]

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- Definition

Deposits, Weighted Average Interest Rate During the Period

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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