Servicing of Residential Loans - Significant Judgment and Key Economic Assumptions Used in Estimation of Fair Value of Servicing Rights (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2013
Forward Loans [Member]
Servicing Rights [Line Items]
Fair value of servicing rights carried at amortized cost	$ 172,149
Reverse Loans [Member]
Servicing Rights [Line Items]
Fair value of servicing rights carried at amortized cost	$ 15,430
Servicing Rights Carried at Amortized Cost [Member] | Forward Loans [Member]
Inputs and assumptions:
Weighted-average remaining life in years	5 years 6 months 0 days
Weighted-average stated borrower interest rate on underlying collateral	7.80%
Weighted-average discount rate	12.16%
Conditional prepayment rate	6.29%
Conditional default rate	3.30%
Servicing Rights Carried at Amortized Cost [Member] | Reverse Loans [Member]
Inputs and assumptions:
Weighted-average remaining life in years	3 years 4 months 0 days
Weighted-average stated borrower interest rate on underlying collateral	3.44%
Weighted-average discount rate	15.00%
Conditional repayment rate	23.45%
Servicing Rights Carried at Fair Value [Member]
Inputs and assumptions:
Weighted-average remaining life in years	6 years 6 months 0 days	6 years 9 months 18 days	6 years 10 months 0 days
Servicing Rights Carried at Fair Value [Member] | Weighted Average [Member]
Inputs and assumptions:
Weighted-average stated borrower interest rate on underlying collateral	4.87%	5.20%
Weighted-average discount rate	9.59%	9.76%	9.76%
Conditional prepayment rate	8.05%	7.06%	7.06%
Conditional default rate	2.44%	2.90%	2.90%