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Deposits - Schedule of Composition of Deposits (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Interest-bearing brokered money market deposits | $ 313,000,000 | $ 439,894,000
Customer deposits | 122,814,000 | 116,694,000
Certificates of deposit with maturities within 1 year | 580,513,000 | 354,807,000
Short-term deposits | 1,016,327,000 | 911,395,000
Certificates of deposit with maturities greater than 1 year and less than 5 years | 600,496,000 | 148,591,000
Total deposits | $ 1,616,823,000 | $ 1,059,986,000
Weighted average cost of funds on certificates of deposit outstanding (as a percent) | 0.52% | 1.81%
Weighted average cost of interest-bearing money market deposits (as a percent) | 0.23% | 0.27%
Certificates of deposits denominations in dollar amount | $ 250,000 | $ 250,000
Minimum |  |
Debt Instrument [Line Items] |  |
Certificate of deposits maturities period | 9 months | 1 year
Certificate of deposits, fixed interest rates range (as a percent) | 0.12% | 1.35%
Maximum |  |
Debt Instrument [Line Items] |  |
Certificate of deposits maturities period | 5 years | 5 years
Certificate of deposits, fixed interest rates range (as a percent) | 3.52% | 3.52%

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- Definition The current portion, due within one year or one operating cycle, if longer, of deposits held other than customer deposits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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 + Details
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- Definition Amount of interest-bearing domestic money market demand account deposit liabilities. + 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 + Details
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- Definition Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits. + 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 + Details
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