Loans and Leases - Recorded Investment of Loans by Class of Loan Based on Payment Activity (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Consumer	$ 3,236	$ 3,456
Consumer Real Estate	28,379	28,624
Total	31,615	32,080
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Consumer	3,233	3,452
Consumer Real Estate	28,040	28,269
Total	31,273	31,721
Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Consumer	3	4
Consumer Real Estate	339	355
Total	$ 342	$ 359