Donegal Group has reported net income of $820m for third quarter of 2011, compared to $103m for the same quarter of 2010.

The company said net premiums written rose 14% in the third quarter of 2011, reflecting a 29.8% gain in commercial lines writings and a 7.6% increase in personal lines writings from the third quarter of 2010.

Total revenues of $119m for the third quarter of 2011, compared to $103m for the same quarter in 2010.

Donegal Group president and CEO Donald Nikolaus said severe weather was once again a significant factor in the loss patterns the entire insurance industry experienced during the third quarter of 2011.