In December 2006, Air Tran Holdings announced that it had been trying to acquire Midwest Air Group. On August 12, 2007, AirTran announced its attempt to purchase Midwest Airlines had expired, while TPG Capital, in partnership with Northwest Airlines, had entered into an agreement to purchase Midwest Airlines for an amount larger than the AirTran Airways' proposal. However, on August 14, 2007, AirTran increased its offer to the equivalent of $16.25 a share, slightly more than the $16 a share from TPG Capital investors group. However, Midwest announced TPG would increase its offer to $17 per share and a definitive agreement had been reached late on August 16, 2007.