WESTLAKE, Ohio--(BUSINESS WIRE)--TravelCenters of America LLC (NYSE: TA) today announced financial results for the first quarter ended March 31, 2015. The following results reflect the operations of 251 travel centers and 60 convenience stores with retail gas stations in 43 U.S. states and in Canada, operated primarily under the “TravelCenters of America”, or “TA”, “Petro” and “Minit Mart” brand names:     Three Months Ended March 31,   2015   2014   Change (In thousands, except per share amoun