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Debt - Summary of the Company's Debt (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Debt | $ 1,329,677 | $ 1,355,359
Unamortized debt issuance costs | (8,215) | (9,512)
Net debt | 1,321,462 | 1,345,847
Unused amount of revolving credit facilities (subject to borrowing base) | 580,655 | 555,117
Senior Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Debt | 105,315 | 147,547
Unamortized debt issuance costs | (1,201) | (1,104)
Net debt | 104,114 | 146,443
RMR II revolving warehouse credit facility |  |
Debt Instrument [Line Items] |  |
Debt |  | 189
Unamortized debt issuance costs |  | (900)
Net debt |  | 189
RMR IV revolving warehouse credit facility |  |
Debt Instrument [Line Items] |  |
Debt | 65 | 18,144
Unamortized debt issuance costs | (400) | (338)
Net debt | 65 | 17,806
RMR V revolving warehouse credit facility |  |
Debt Instrument [Line Items] |  |
Debt | 20,099 | 286
Unamortized debt issuance costs | (400) | (400)
Net debt | 20,099 | 286
RMR VI revolving warehouse credit facility |  |
Debt Instrument [Line Items] |  |
Debt | 15,005 |
Unamortized debt issuance costs | (900) |
Net debt | 15,005 |
RMIT 2020-1 securitization |  |
Debt Instrument [Line Items] |  |
Debt | 180,214 | 180,214
Unamortized debt issuance costs | (412) | (618)
Net debt | 179,802 | 179,596
RMIT 2021-1 securitization |  |
Debt Instrument [Line Items] |  |
Debt | 248,916 | 248,916
Unamortized debt issuance costs | (774) | (985)
Net debt | 248,142 | 247,931
RMIT 2021-2 securitization |  |
Debt Instrument [Line Items] |  |
Debt | 200,192 | 200,192
Unamortized debt issuance costs | (1,427) | (1,534)
Net debt | 198,765 | 198,658
RMIT 2021-3 securitization |  |
Debt Instrument [Line Items] |  |
Debt | 125,202 | 125,202
Unamortized debt issuance costs | (1,099) | (1,178)
Net debt | 124,103 | 124,024
RMIT 2022-1 securitization |  |
Debt Instrument [Line Items] |  |
Debt | 250,374 | 250,374
Unamortized debt issuance costs | (1,629) | (1,841)
Net debt | 248,745 | 248,533
RMIT 2022-2B securitization |  |
Debt Instrument [Line Items] |  |
Debt | 184,295 | 184,295
Unamortized debt issuance costs | (1,673) | (1,914)
Net debt | $ 182,622 | $ 182,381

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: 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(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: 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(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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