Marshall & Ilsley Corp. said Thursday it agreed to acquire Leawood-based Gold Banc Corp. for $700 million, a move to tap into banking markets in Kansas, Missouri, Florida and Oklahoma.

Gold Bank, as the corporation’s banks are called, had $4.1 billion in assets as of the end of September. It has 13 branches in the Kansas City metro area.

The banks are set to turn into M&I Bank branches in the second quarter of next year.

Under the agreement, expected to close in the spring of 2006, Milwaukee-based Marshall & Ilsley will pay Gold Banc $18.50 a share – $2.78 of it in cash and $15.72 in Marshall & Ilsley stock.