| Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
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| Consolidated net income | 192 | 162 | 109 | 978 | 113 | 62 | 85 |
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| Gains on originated mortgage servicing rights | 95 | 103 | 194 | 148 | 130 | 76 | 104 |
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| Depreciation and amortization | 98 | 131 | 141 | 122 | 166 | 166 | 174 |
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| Lease impairment | - | - | - | - | 14 | 8 | - |
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| Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | - | - | - | - | - | 3 | -2 |
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| Provision (reversal) for doubtful accounts | 4 | 2 | 5 | 6 | 7 | -2 | 0 |
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| Equity-based compensation and allocation of net income to limited partnership units and FPUs | - | - | - | 356 | 138 | 140 | 185 |
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| Amortization | 28 | 39 | 74 | 79 | 84 | 93 | 124 |
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| Deferred tax provision (benefit) | 16 | -28 | 0 | 119 | -24 | -5 | 1 |
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| Noncash Changes In Acquisition Earnouts | - | - | -10 | 0 | -1 | 5 | -4 |
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| Unrealized (gains) on loans held for sale | 18 | 5 | 24 | 21 | 1 | 27 | 10 |
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| Income from an equity method investment | 3 | 7 | -12 | - | 3 | 14 | - |
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| Unrealized losses on marketable securities | -1 | 11 | 5 | 77 | -81 | -1 | -0 |
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| Unrealized losses (gains) on non-marketable investments | - | - | - | - | -13 | -4 | 0 |
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| Loan originations—loans held for sale | 8,613 | 8,783 | 12,374 | 9,142 | 7,823 | 6,913 | 8,626 |
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| Loan sales—loans held for sale | 8,003 | 9,564 | 11,527 | 9,178 | 8,758 | 6,549 | 8,390 |
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| Other | 2 | 4 | 3 | 4 | 2 | 2 | -1 |
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| Consolidated net income (loss), adjusted for non-cash and non-operating items | - | - | - | -301 | 1,402 | -5 | 214 |
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| Receivables, net | 129 | 52 | -124 | 191 | -42 | 69 | -18 |
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| Loans, forgivable loans and other receivables from employees and partners, net | 110 | 162 | 128 | 78 | 132 | 243 | 212 |
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| Right-of-use assets | - | - | -11 | -42 | 42 | -54 | -96 |
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| Receivable from related parties | - | - | - | 8 | -8 | - | 0 |
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| Other assets | 10 | 113 | -22 | -9 | -9 | 9 | -3 |
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| Accrued compensation | 50 | 40 | -75 | -83 | -102 | -22 | -15 |
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| Right-of-use liability | - | - | - | - | - | -40 | -107 |
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| Accounts payable, accrued expenses and other liabilities | 153 | 91 | -82 | -4 | -35 | 72 | 1 |
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| Payables to related parties | - | 23 | -26 | 0 | -5 | -3 | -7 |
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| Net cash used in operating activities | -332 | 987 | -778 | -49 | 1,196 | -266 | -10 |
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| Payments for acquisitions, net of cash acquired and proceeds from divestitures | - | - | - | - | - | 100 | - |
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| Proceeds from the sale of marketable securities | 96 | 33 | 35 | 551 | 438 | - | - |
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| Proceeds from the exercise of redemption option | - | - | - | - | - | 106 | - |
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| Purchase of marketable securities | - | - | - | - | 0 | - | - |
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| Purchase of non-marketable investments | - | - | - | - | - | - | 0 |
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| Payments for intangible assets | - | - | - | - | - | - | 2 |
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| Purchases of fixed assets | 21 | 35 | 20 | 20 | 62 | 55 | 32 |
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| Purchase of mortgage servicing rights | 3 | 1 | 0 | - | - | - | 0 |
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| Net cash used in investing activities | 8 | -57 | -4 | 453 | 309 | -50 | -33 |
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| Proceeds from Lines of Credit | 8,613 | 8,783 | 12,374 | 9,142 | 7,823 | 6,913 | 8,626 |
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| Principal payments on warehouse facilities | 8,001 | 9,546 | 11,523 | 9,153 | 8,736 | 6,552 | 8,370 |
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| Borrowing of debt | - | 155 | 365 | 55 | - | 930 | 845 |
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| Repayment of debt | - | 105 | 275 | 195 | - | 930 | 720 |
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| Repurchase agreements and securities loaned | - | 37 | -3 | 107 | -140 | - | - |
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| Purchase of limited partnership interests | - | - | - | - | - | - | 12 |
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| Treasury stock repurchases | 0 | 37 | 6 | 291 | 295 | 37 | 213 |
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| Earnings and tax distributions to limited partnership interests and other noncontrolling interests | 46 | 141 | 82 | 15 | 81 | 35 | 39 |
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| Dividends to stockholders | 42 | 69 | 23 | 8 | 18 | 21 | 21 |
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| Payments on acquisition earn-outs | 4 | 5 | 5 | 43 | 6 | 1 | - |
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| Deferred financing costs | 1 | 1 | 4 | 1 | 5 | 5 | 7 |
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| Net cash provided by financing activities | 337 | -896 | 818 | -396 | -1,459 | 261 | 90 |
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| Net increase (decrease) in cash and cash equivalents and restricted cash | - | - | 37 | 8 | 46 | -54 | 46 |
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| Interest | 82 | 37 | 41 | 36 | 38 | 45 | 32 |
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| Taxes | 1 | 95 | 80 | 99 | 100 | 57 | 50 |
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| Right-of-use assets and liabilities | - | 182 | 38 | 498 | 139 | 80 | 46 |
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