Willow Financial Bancorp Inc. (Nasdaq:WFBC) are up 21% after the Wayne, Penn.-based announced it is being bought by Harleysville National Corp. for about $162 million in stock. Harleysville said it wants to expand its Pennsylvania presence. Willow shareholders will receive 0.73 Harleysville shares for each share held as part of the acquisition deal.

In Wednesday morning trading, WFBC shares are surging 21.4%, or $1.66, to $9.40. For detailed price information and recent news stories about Willow Financial Bancorp, click WFBC.