Other Borrowings - Summary of Other Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2013
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Federal Home Loan Bank Advances effective rate	0.17%
Maturity period of Federal Home Loan Bank advances	Jan. 24, 2014
Revolving Credit Facility [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Interest rate description	90-day LIBOR plus 4.00% (4.24% at December 31, 2013)
Interest rate	4.00%
Interest rate in excess of 90-day LIBOR	4.24%
Maturity period of Federal Home Loan Bank advances	2016-08
Subordinated Debt One [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Interest rate description	90-day LIBOR plus 1.60% (1.84% at December 31, 2013)
Interest rate	1.60%
Interest rate in excess of 90-day LIBOR	1.84%
Maturity period of Federal Home Loan Bank advances	2016-06
Subordinated Debt Two [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Interest rate description	90-day LIBOR plus 1.75% (1.99% at December 31, 2013)
Interest rate	1.75%
Interest rate in excess of 90-day LIBOR	1.99%
Maturity period of Federal Home Loan Bank advances	2016-09