Argan may be that rarest of beasts: a dividend stock that's also a value and growth-at-a-reasonable-price (GARP) stock.Shares of power plant construction company Argan (AGX 7.09%) hit a 52-week high earlier this month after the company reported powerful sales and earnings growth in its fiscal second quarter. The stock is climbing again on Thursday afternoon, up 6.6% through 12:10 p.m. ET, for an entirely different reason.Argan is increasing its dividend.How much is Argan's dividend?Argan hasn't ever been a ...