Irving-based Del Frisco's Restaurant Group Inc. (Nasdaq: DFRG) has entered into an agreement to be acquired by a private equity firm, according to a press release. L Catterton will buy all of Del Frisco's assets as part of the all-cash deal valued at $650 million. The large consumer-focused firm will buy the restaurant group at $8 per share, which represents a 22 percent premium to the restaurant group's closing share price on Dec. 19, the last trading day prior to the announcement of its...