Blackbaud Inc. made $33.2 million on revenue of $370.9 million in 2011, both sizeable increases over 2010, the Daniel Island software company reported Wednesday afternoon. Diluted earnings per share were 75 cents for the year compared to 67 cents for 2010.

Blackbaud also announced Wednesday that shareholders of record as of March 5 will receive a first quarter 2012 dividend of 12 cents per share payable on March 15.

But Blackbaud’s fourth-quarter net income, $6.4 million, was down from the $7.2 million it reported in earnings during the same period last year.

The software company’s financial report comes as the antitrust review of Blackbaud’s plans to acquire a Texas rival for $275 million enters its second month.

On Friday, Blackbaud pushed back the expiration date on its offer to acquire Convio to allow the Department of Justice more time to review the deal. Both Blackbaud and Austin, Tex.-based Convio make software specifically for nonprofits.

The $16-a-share offer can be extended in 10-day increments by agreement of the parties through Sept. 30, if need be, and also must still be approved by Convio’s shareholders.

Blackbaud CEO Marc Chardon, who last month said he expected the deal to close by the end of March, will speak to investors during a 5 p.m. conference call.

The full report can be seen here.

Reach Brendan Kearney at 937-5906 and follow him at twitter.com/kearney_brendan.