Acquired Identifiable Assets and Liabilities as of Acquisition Date (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Purchase price:
Cash	$ 3,300
Total purchase price	3,300
Identifiable assets:
Cash and due from banks	46,450
Investments	2,508
Loans and leases	124,165
Other Real Estate	87
Core deposit intangible	680
Personal and real property	10,655
Deferred tax asset	2,969
Other assets	1,034
Total assets	188,548
Liabilities and equity:
Deposits	185,771
Other liabilities	736
Total liabilities	186,507
Net assets acquired	2,041
Goodwill resulting from acquisition	$ 1,259