Dollar Thrifty Automotive Group reports best first quarter profit in its history

[b]Dollar Thrifty Automotive Group reports best first quarter profit in its history[/b] Dollar Thrifty Automotive Group, Inc. (NYSE: DTG) reported results for the first quarter ended March 31, 2010. Net income for the 2010 first quarter was $27.3 million, or $0.91 per diluted share, compared to a net loss of $8.9...