First Interstate Bancsystem Inc. reported unaudited consolidated earnings results for the fourth quarter and full year ended December 31, 2015. For the quarter, the company reported net interest income of $68,420,000 compared to $65,516,000 a year ago. Income before taxes was $35,085,000 compared to $35,106,000 a year ago. Net income was $23,431,000 or $0.51 per diluted share compared to $22,776,000 or $0.49 per diluted share a year ago. Core net income was $23,496,000 or $0.52 per diluted share compared to $24,260,000 or $0.53 per diluted share a year ago. Core pre-tax, pre-provision net income was $38,478,000 compared to $37,611,000 a year ago. Book value was $20.92 as on December 31, 2015 compared to $19.85 as on December 31, 2014. Tangible book value was $16.19 as on December 31, 2015 compared to $15.07 as on December 31, 2014. Return on average assets was 1.07% compared to 1.05% a year ago. Core return on average assets was 1.07% compared to 1.12% a year ago. Return on average common equity was 9.83% compared to 10.09% a year ago. Core return on average common equity was 9.86% compared to 10.75% a year ago. Return on average tangible common equity was 12.73% compared to 13.34% a year ago. The increase in net interest income was a result of the loan growth saw in the quarter along with an improvement in net interest margin.

For the year, the company reported net interest income of was $264,363,000 compared to $248,461,000 a year ago. Income before taxes was $130,457,000 compared to $129,615,000 a year ago. Net income was $86,795,000 or $1.90 per diluted share compared to $84,401,000 or $1.87 per diluted share a year ago. Core net income was $90,314,000 or $1.98 per diluted share compared to $89,349,000 or $1.98 per diluted share a year ago. Core pre-tax, pre-provision net income was $142,937,000 compared to $130,949,000 a year ago. Return on average assets was 1.02% compared to 1.06% a year ago. Core return on average assets was 1.06% compared to 1.12% a year ago. Return on average common equity was 9.37% compared to 9.86% a year ago. Core return on average common equity was 9.75% compared to 10.44% a year ago. Return on average tangible common was 12.23% compared to 12.88% a year ago.

For the fourth quarter of 2015, the company reported net charge-offs of $728,000 compared to $149,000 for the same period a year ago.