NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned 'BB+/B' long- and short-term Issuer Default Ratings (IDRs) to CIT Bank, N.A., following the announcement that CIT Group Inc. (CIT) completed its acquisition of IMB Holdco LLC, the parent company of OneWest Bank N.A. for approximately $3.4 billion in cash and stock. As part of that transaction, CIT Bank merged with and into OneWest Bank N.A. and the combined entity was re-named CIT Bank, N.A. The Rating Outlook is Stable. Fitch has also affir