First Financial Bankshares Inc. announced unaudited consolidated financial results for the fourth quarter and year ended December 31, 2011. For the quarter, the company reported net interest income was $38.184 million against $36.154 million a year ago. Net income before income taxes and extraordinary item was $23.498 million against $20.771 million a year ago. Net income was $17.466 million or $0.55 per diluted share against $15.515 million or $0.49 per diluted share a year ago. Return on average assets was 1.74% against 1.71% a year ago. Return on average equity was 13.88% against 13.63% a year ago. For the year, the company reported net interest income was $151.997 million against $136.171 million a year ago. Net income before income taxes and extraordinary item was $92.185 million against $78.431 million a year ago. Net income was $68.369 million or $2.17 per diluted share against $59.659 million or $1.91 per diluted share a year ago. Book value as on December 31, 2011 was $16.16 against $14.06 a year ago. Return on average assets was 1.78% against 1.75% a year ago. Return on average equity was 14.44% against 13.74% a year ago.