Weighted average life of loan subject to FDIC Agreement (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Commercial Loans [Member]
Loss Share Indemnification Asset [Line Items]
Weighted Average Life Of Loan Subject To F D I C Agreement	0 years 0 months 2110 days	0 years 0 months 2347 days
Consumer [Member]
Loss Share Indemnification Asset [Line Items]
Weighted Average Life Of Loan Subject To F D I C Agreement	0 years 0 months 1153 days	0 years 0 months 1142 days
Construction [Member]
Loss Share Indemnification Asset [Line Items]
Weighted Average Life Of Loan Subject To F D I C Agreement	0 years 0 months 493 days	0 years 0 months 475 days
Mortgages [Member]
Loss Share Indemnification Asset [Line Items]
Weighted Average Life Of Loan Subject To F D I C Agreement	0 years 0 months 2508 days	0 years 0 months 2522 days