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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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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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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

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Residential Loans at Amortized Cost, Net - Summary of Residential Loans, Net (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans, principal balance	$ 1,415,227,000	$ 1,442,838,000
Unamortized discounts and other cost basis adjustments, net	(115,669,000)	(118,266,000)
Allowance for loan losses	(10,660,000)	(10,033,000)	(12,084,000)	(14,320,000)
Residential loans at amortized cost, net	1,288,898,000us-gaap_LoansReceivableNet	1,314,539,000us-gaap_LoansReceivableNet
Unencumbered Forward Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans at amortized cost, net	20,800,000	21,800,000
Residential Loans At Amortized Cost Net [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 11,200,000	$ 12,000,000