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Significant Accounting Policies - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restricted cash | $ 86,559,000 | $ 108,830,000 |
Client deposit held | $ 7,500,000,000 | 8,600,000,000 |
Lease terms | 10 years |  |
Debt agreement term | 10 years |  |
Line of credit debt issuance costs | $ 11,100,000 | 9,500,000 |
Business promotion and advertising costs | 85,100,000 | 68,900,000 | $ 57,200,000
Estimated fair value of mortgage servicing rights | 1,100,000,000 | 891,000,000 |
Mortgage servicing rights, impairment charges | $ 0 | 0 |
Ancillary Fee Income, Servicing Financial Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] | Revenue |  |
Revenue | $ 30,173,752,000 | 26,950,366,000 | 23,170,119,000
Prepayment fees/late fees/ancillary income earned from loans servicing | 22,700,000 | 41,700,000 | 11,000,000
Reserve for claims insurance programs | 167,900,000 | 153,400,000 |
Reserve for claims insurance programs, current | $ 3,000,000 | $ 2,200,000 |
Redeemed common stock (in shares) | 311,014,160 | 332,875,959 |
Servicing fees |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Revenue | $ 309,500,000 | $ 288,000,000 | $ 212,900,000
Wholly Owned Property |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Ownership interest in property | 100.00% |  |
Commercial Real Estate |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Ownership interest in property | 0.00% |  |
Enterprise software development platforms |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 3 years |  |
Minimum | Enterprise software development platforms |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 3 years |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 10 years |  |
Maximum | Buildings and Improvements |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 39 years |  |
Maximum | Land Improvements |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 15 years |  |
Maximum | Enterprise software development platforms |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment useful life | 7 years |  |
Maximum | Goodwill and other intangible assets |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Intangible assets, estimated useful life | 20 years |  |

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