Loans and Allowance for Loan Losses - Summary of Purchased Credit-Impaired Loans, Information Identified in Corporation's Acquisition of ANNB and PVF (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 Annapolis Bancorp, Inc. [Member]	Apr. 06, 2013 Annapolis Bancorp, Inc. [Member]	Dec. 31, 2013 PVF Capital Corp (PVF) [Member]	Oct. 12, 2013 PVF Capital Corp (PVF) [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Outstanding balance	$ 5,580	$ 12,220	$ 29,642	$ 29,811
Carrying amount	2,308	3,848	11,063	11,412
Allowance for loan losses
Impairment recognized since acquisition	31
Allowance reduction recognized since acquisition