Reverse Mortgage and Related Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2014 Zero Collateral Value [Member]	Jun. 30, 2014 Collateral Value Reduced by One Percent [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Minimum [Member]	Jul. 31, 2011 SASCO 2002-RM1's Class O Securities [Member] Mortgage-Backed Securities ("MBS") [Member]
Reverse Mortgage Loan Activities [Line Items]
Trading securities, par value	$ 0		$ 0					$ 2,500,000
Investments purchase percentage								100.00%
Income tax benefit		6,700,000
Consolidated mortgage investment	32,500,000		32,500,000
Average age of a mortgage backed securities borrower			92 years
Realizable collateral value of mortgage backed securities	55,500,000		55,500,000
Forecasted housing prices increase rate			2.50%
Forecasted housing prices increase rate, following year and thereafter			2.00%
Internal rate of return			15.55%	14.21%	14.80%
Cash payments to reverse mortgagors	6,900,000		6,900,000
Decrease in income	193,000			344,000
Reduction in collateral value	1.00%
Net present value increase or decrease						$ 293,000	$ 291,000
Change in present value of IRR						1.00%	1.00%