Douglas Dynamics (NYSE: PLOW) thrives when winter conditions are harsh, but the company has now had to deal with two straight winters with fairly benign weather. Coming into Monday’s fourth-quarter financial report, Douglas Dynamics investors were prepared to see falling earnings from year-ago levels, but they still wanted to see signs that the company’s latest acquisition was successful in helping it diversify its seasonal exposure. Douglas Dynamics’ results were largely as expected, and a mixed outlook for 2017 was still sufficient to satisfy investors.