Residential Loans at Amortized Cost, Net - Schedule of Activity in Allowance for Loan Losses on Residential Loans at Amortized Cost, Net (Detail) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
Feb. 09, 2018	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of the period	$ 6,347	$ 681	$ 5,167
Adoption of ASC 610				$ (40,670)
Fresh start accounting adjustments	(4,264)
Provision for loan losses	238	69	3,643
Charge-offs, net of recoveries	(102)	190	(2,463)
Balance at end of the period	681	$ 940	6,347
Charge-offs recognized upon foreclosure of real estate in satisfaction of residential loans	$ 100		$ 1,000
Residential Loans At Amortized Cost, Net [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Adoption of ASC 610				$ (1,538)

Fresh-Start Adjustment, Increase (Decrease), Allowance for Loan Losses

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount, after recoveries, of loans and leases that have been written-off.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

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