BRUSSELS, July 16 (Reuters) - Belgium's Delen Private Bank has agreed to buy smaller rival Dierickx Leys Private Bank, the companies said on Tuesday.

Financial details of the takeover were not disclosed, but Delen Private Bank - in which Belgian holding company Ackermans & Van Haren is a shareholder - has 58.6 billion euros ($63.76 billion) of assets under management while Dierickx Leys has 3 billion euros of client assets under management. ($1 = 0.9191 euros) (Reporting by Sudip Kar-Gupta Editing by David Goodman )