Income Taxes - Summary of Deferred Taxes (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Deferred tax assets:
Reserves for expected costs of liquidation and Residual Wind-Down Claims and Costs	$ 14,792
Net operating and capital loss carryovers	119,095
Gross deferred tax assets	133,887
Less: Valuation allowance	(133,443)
Deferred tax asset, net of valuation allowance	444
Deferred tax liabilities:
Accrued investment income	(444)
Gross deferred tax liabilities	(444)
Net deferred taxes	$ 0