The move will more than double the size of Eldorado's branch network, while allowing MidCountry to exit the market.
The merger will create a bank with more than $4 billion in assets.
Fourth-quarter profits at Wintrust Financial in Rosemont, Ill., climbed 54% to $54.6 million from a year earlier, helped largely by acquisitions and increases in mortgage banking and other fee income.
The company will pay $23.4 million for the $194 million-asset parent of Capaha Bank.
