Consideration Transferred for Commerce First's Common Equity and Amount of Acquired Identifiable Assets and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	May 31, 2012 CommerceFirst Bancorp, inc.
Purchase Price:
Value of common share issued		$ 13,023
Cash		12,381
Business Acquisition, Cost of Acquired Entity, Purchase Price		25,404
Cash and due from banks		11,532
Investments		502
Loans and leases		165,762
Other Real Estate Owned		2,615
Intangible assets		210
Other assets		7,356
Total identifiable assets		187,977
Deposits		169,921
Other Liabilities		644
Total liabilities		170,565
Net goodwill resulting from acquisition	$ 7,992	$ 8,000