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Deposits (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Deposits
Deposits	$ 1,821,375	$ 1,530,379
Average balance, deposits	$ 1,660,372	$ 1,496,430
Deposits, weighted average interest rate during the period	0.62%	1.53%
Non-interest-bearing transaction accounts
Deposits
Deposits	$ 452,268	$ 293,573
Average balance, deposits	$ 392,455	$ 275,495
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits
Deposits	$ 484,761	$ 273,909
Average balance, deposits	$ 362,326	$ 222,244
Deposits, weighted average interest rate during the period	0.44%	1.53%
Money market accounts
Deposits
Deposits	$ 636,872	$ 674,409
Average balance, deposits	$ 649,999	$ 617,341
Deposits, weighted average interest rate during the period	0.52%	1.71%
Certificates of deposit
Deposits
Deposits	$ 93,344	$ 137,012
Average balance, deposits	$ 122,781	$ 156,048
Deposits, weighted average interest rate during the period	2.05%	2.47%
Wholesale deposits
Deposits
Deposits	$ 154,130	$ 151,476
Average balance, deposits	$ 132,811	$ 225,302
Deposits, weighted average interest rate during the period	2.03%	2.27%

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- Definition

Average Balance, Deposits

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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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No definition available.

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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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