Loans Receivable - Overall Statistics for Loans Receivable Portfolio (Parenthetical) (Detail)	Dec. 31, 2013
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor rate	0.20%
Minimum [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor rate	0.20%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor rate	1.00%
Maximum [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor rate	1.00%