Other Debt - Repurchase Agreements (Detail) (USD $)	6 Months Ended		0 Months Ended
	Jun. 30, 2014		Feb. 07, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Other debt, net	146,158,000	[1]		$ 104,804,000	[1]
Secured Debt [Member] | Debt Repurchase Agreement [Member]
Short-term Debt [Line Items]
Other debt, net			49,000,000
Line of Credit Facility, Length of Optional Renewable Period	90 days
Secured Debt [Member] | Debt Repurchase Agreement [Member] | Minimum [Member] | LIBOR [Member]
Short-term Debt [Line Items]
Debt instrument, basis spread on variable rate			1.35%
Secured Debt [Member] | Debt Repurchase Agreement [Member] | Maximum [Member] | LIBOR [Member]
Short-term Debt [Line Items]
Debt instrument, basis spread on variable rate			1.75%
Secured Debt [Member] | Commercial Mortgage Backed Securities [Member]
Short-term Debt [Line Items]
Weighted average maturity	7 years 8 months 19 days
Financial instruments, owned and pledged as collateral, at fair value	144,800,000
Available-for-sale securities, restricted	139,300,000

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.