Subsequent Events (Details) (USD $)	0 Months Ended	6 Months Ended
	Jul. 19, 2012	Jun. 30, 2012	Dec. 31, 2011
Subsequent Events (Textual) [Abstract]
Subsquent event, date of merger	Jul. 19, 2012
Subsequent event description		WesBanco and Fidelity Bancorp, Inc. (“Fidelity”), a Pittsburgh-based bank with $0.7 billion in assets and 13 branches, jointly announced that a definitive Agreement and Plan of Merger was executed providing for the merger of Fidelity with and into WesBanco. Under the terms of the Agreement and Plan of Merger, WesBanco will exchange 0.8275 shares of its common stock and $4.50 in cash for each share of Fidelity common stock.
Total acquisition-related transaction		$ 70,800,000
Number of shares		0.8275
Cash paid		4.50
Subsquent event,estimated acquisition time		Fourth quarter of 2012 or early 2013
Assets acquired		5,525,405,000	5,536,030,000
WesBanco and Fidelity Bancorp Inc [Member]
Subsequent Events (Textual) [Abstract]
Number of branch locations		13
Assets acquired		$ 700,000,000