Fair Value - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent earn-out payments	$ 5,900,000	$ 0	$ 10,900,000	$ 0	$ 10,900,000
Payment made to the prior owners	5,000,000
Real estate owned, net	73,573,000	79,079,000		79,079,000
Real estate fair value adjustments		200,000	300,000	600,000	300,000
Goodwill impairment		82,269,000	0	82,269,000	0
Receivables Related to Non-Residual Trusts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value gains (losses) from changes in instrument-specific credit risk		(600,000)	800,000	(1,700,000)	3,800,000
Forward Loans in Non-Residual Trusts [Member] | Loans Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of days for fair value option delinquency disclosure				90 days
Fair value of loans past due under fair value option	1,700,000	1,500,000		1,500,000
Unpaid principal balance of loans past due under fair value option	9,400,000	8,200,000		8,200,000
Fair value gains (losses) from changes in instrument-specific credit risk		500,000	900,000	1,100,000	(3,800,000)
Charged Off Loans [Member] | Loans Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of days for fair value option delinquency disclosure				90 days
Loans and Residuals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate owned, net	45,300,000	34,200,000		34,200,000
Reverse Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate owned, net	27,000,000	43,800,000		43,800,000
Goodwill impairment				82,269,000
Other Segments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate owned, net	$ 1,300,000	$ 1,100,000		$ 1,100,000