| In millions, except per share items | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash flows from operating activities | | | | | | | | |
| Net income (loss) | -129.9 | -116.4 | 58.8 | 77.9 | 80.2 | 82.5 | 82.7 | 81.8 |
| |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Accretion of deferred origination and amendment fees | -20.4 | -21.6 | -23.9 | -24.7 | -26.4 | -27.7 | -28.6 | -36.9 |
| Depreciation and amortization | 2.8 | 2.8 | 2.4 | 2.3 | 2.4 | 2.0 | 1.6 | 0.4 |
| Goodwill impairment | | | | | | | | |
| Amortization of right of use assets | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.6 |
| Amortization of debt issuance costs | 0.6 | 0.6 | 0.4 | 0.3 | 0.1 | | | |
| Amortization of credit facility costs | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.3 | 0.9 | 0.5 |
| Stock-based compensation expense for restricted stock units | 3.7 | 3.8 | 4.2 | 3.8 | 3.7 | 3.5 | 3.6 | 4.6 |
| Provision for credit losses, net | 38.2 | 38.3 | 17.5 | 7.9 | 5.2 | 6.2 | 5.4 | 2.8 |
| Gain on sale of real property | -0.7 | | -1.0 | -1.0 | -0.3 | | | |
| Impairment | 8.6 | 7.6 | 1.8 | -0.3 | | | | |
| Change in fair value of warrant liabilities | | -1.8 | -1.2 | -2.1 | 1.8 | 1.8 | 2.1 | 1.4 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Interest and fees receivable, net | 2.0 | 1.5 | -2.4 | -5.3 | -3.0 | -3.2 | -2.8 | -3.2 |
| Other assets | 0.5 | 0.0 | -0.7 | -0.3 | 0.1 | 0.4 | 0.0 | 1.3 |
| Accounts payable and accrued liabilities | 2.8 | 6.6 | 6.4 | 2.7 | -1.4 | -1.4 | -0.3 | 1.4 |
| Lease liabilities | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.4 | -0.4 | -0.5 |
| Net cash provided by operating activities | 43.6 | 57.2 | 62.3 | 61.8 | 62.3 | 64.1 | 64.7 | 52.3 |
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| Cash flows from investing activities: | | | | | | | | |
| Fundings of mortgage notes receivable | -619.1 | -664.4 | -786.1 | -810.4 | -798.8 | | | |
| Principal collections | 477.3 | 500.5 | 617.4 | 534.9 | 550.7 | 569.1 | 338.4 | 228.2 |
| Origination and amendment fees received on mortgage notes receivable | 14.5 | 15.1 | 19.0 | 15.4 | 13.6 | 13.9 | 6.0 | 3.6 |
| Purchases of property and equipment | | -0.1 | -0.2 | -0.3 | -0.5 | -0.5 | -0.4 | -0.2 |
| Proceeds from sale of real property | 6.4 | 8.4 | 8.9 | 11.8 | 8.8 | 4.3 | 8.0 | 5.0 |
| Improvements in real property | -6.3 | -5.9 | -6.3 | -6.5 | -5.6 | -4.4 | -3.4 | -1.8 |
| Repurchase of participations in mortgage notes receivable | | | | | | | | |
| Net cash provided by (used in) investing activities | -3.4 | -22.7 | -23.5 | -174.8 | -154.1 | -136.1 | -89.5 | 1.0 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Dividends paid | -92.9 | -106.9 | -111.5 | -111.5 | -111.4 | -110.1 | -106.0 | -102.0 |
| Purchase of treasury stock | | | | | | | | |
| Proceeds from issuance of senior unsecured notes | | | | | | | | |
| Payment of debt issue costs | | | | | | | | |
| Payment of costs to obtain financing | | | | | | | | |
| Proceeds from borrowings on credit facilities | | | | | | | | |
| Repayment of borrowings on credit facilities | | | | | | | | |
| Payment of taxes on shares withheld for tax liability | -0.7 | -0.8 | -0.9 | | -0.8 | -0.5 | -0.3 | |
| Net cash used in financing activities | -98.3 | -112.4 | -15.0 | -15.1 | -15.1 | -18.5 | -111.5 | -107.3 |
| Net decrease in cash and cash equivalents | -58.1 | -77.9 | 23.8 | -128.1 | -106.9 | -90.5 | -200.8 | -74.2 |
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| Supplemental disclosure of cash flow information: | | | | | | | | |
| Interest paid | | | | | | | | |
| Supplemental disclosure of non-cash investing and financing activities: | | | | | | | | |
| Dividends payable | | | | | | | | |
| Measurement Period Adjustment to Goodwill and Intangible Assets | | | | | | | | |
| Mortgage notes receivable converted to investment in real property | | | | | | | | |
| Investments in real property converted to mortgage notes receivable | | | | | | | | |
| Interest and fee receivables converted to investments in real property | | | | | | | | |
| Operating lease right-of-use assets | | | | | | | | |
| Lease liabilities arising from obtaining right-of-use assets | | | | | | | | |
| Property and equipment purchased through tenant improvement allowance | | | | | | | | |