Blackhawk Bancorp Inc. reported unaudited consolidated earnings results for the first quarter ended March 31, 2013. For the quarter, the company reported earnings of $583,000, a 14% decrease compared to $678,000 earned in the first quarter of 2012. Earnings per diluted share for the quarter decreased $0.05 to $0.19 compared to $0.24 the first quarter of 2012.

The company saw improvements in net interest income and the provision for loan losses, which were more than offset by a decline in non-interest income. Return on average assets was 0.42% compared with 0.49% a year ago. Return on common equity was 4.52% compared with 6.03% a year ago.

Net interest income for the quarter increased 1% to $4,731,000 compared to $4,692,000 in the first quarter 2012. Income before income taxes was $542,000 compared with $825,000 a year ago.