v3.26.1
Assets Sold Under Agreements to Repurchase - Summary of Assets Sold under Agreements to Repurchase by Counterparty (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2026
USD ($)
Atlas Securitized Products, L.P. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 473,643
Weighted-average maturity, Advances Aug. 20, 2026
Weighted-average maturity, Facility Dec. 10, 2027
Santander US Capital [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 45,412
Weighted average maturity Aug. 19, 2026
Santander US Capital [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 70,914
Weighted-average maturity, Advances Aug. 26, 2026
Weighted-average maturity, Facility Aug. 26, 2026
Bank of America, N.A. [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 16,068
Weighted average maturity Jul. 29, 2026
Bank of America, N.A. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 97,352
Weighted-average maturity, Advances Jul. 31, 2026
Weighted-average maturity, Facility Apr. 28, 2027
Citibank, N.A. [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 6,949
Weighted average maturity Jul. 23, 2026
Citibank, N.A. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 77,861
Weighted-average maturity, Advances Sep. 08, 2026
Weighted-average maturity, Facility Jul. 05, 2027
Nomura Holdings America Inc [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 1,196
Weighted average maturity Sep. 30, 2026
Nomura Holdings America Inc [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 72,588
Weighted-average maturity, Advances Jul. 29, 2026
Weighted-average maturity, Facility Jul. 29, 2026
Goldman Sachs & Co. LLC [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 10,698
Weighted average maturity Aug. 06, 2026
Goldman Sachs & Co. LLC [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 50,836
Weighted-average maturity, Advances Aug. 26, 2026
Weighted-average maturity, Facility Mar. 12, 2028
Wells Fargo Securities L L C [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 17,113
Weighted average maturity Jul. 10, 2026
Wells Fargo Securities L L C [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 26,222
Weighted-average maturity, Advances Aug. 22, 2026
Weighted-average maturity, Facility Mar. 24, 2027
RBC Capital Markets L.P. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 16,996
Weighted-average maturity, Advances Sep. 21, 2026
Weighted-average maturity, Facility Apr. 15, 2027
RBC Capital Markets L.P. [Member] | Credit Risk Transfer Agreements [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 22,352
Weighted average maturity Jul. 22, 2026
Barclays Capital Inc. [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 10,512
Weighted average maturity Jul. 11, 2026
Barclays Capital Inc. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 28,494
Weighted-average maturity, Advances Aug. 25, 2026
Weighted-average maturity, Facility May 15, 2028
JPMorgan Chase & Co. [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 32,447
Weighted average maturity Jul. 18, 2026
JPMorgan Chase & Co. [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 3,149
Weighted-average maturity, Advances Aug. 31, 2026
Weighted-average maturity, Facility Jun. 25, 2027
Morgan Stanley & Co. LLC [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 11,683
Weighted-average maturity, Advances Aug. 06, 2026
Weighted-average maturity, Facility May 06, 2027
Morgan Stanley & Co. LLC [Member] | Credit Risk Transfer Agreements [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 17,530
Weighted average maturity Jul. 30, 2026
BNP Paribas [Member] | Mortgage loans acquired for sale, mortgage loans, REO and MSRs sold under agreements to repurchase [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 20,785
Weighted-average maturity, Advances Aug. 14, 2026
Weighted-average maturity, Facility Jul. 22, 2027
Bank of Montreal [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 11,163
Weighted average maturity Aug. 28, 2026
Daiwa Capital Markets America Inc. [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 4,319
Weighted average maturity Jul. 06, 2026
Mizuho Financial Group [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Amounts at risk $ 3,092
Weighted average maturity Jul. 24, 2026