WALLA WALLA, Wash.--(BUSINESS WIRE)-- Banner Corporation (NASDAQ: BANR ) ("Banner"), the parent company of Banner Bank, today announced that Kroll Bond Rating Agency, LLC (KBRA) affirmed the senior unsecured debt rating of BBB+, the subordinated debt rating of BBB, and the short-term debt rating of K2 for Banner Corporation. In addition, KBRA affirmed the deposit and senior unsecured debt ratings of A-, the subordinated debt rating of BBB+, and the short-term deposit and debt ratings of K2 for the company's principal subsidiary, Banner Bank. The agency also noted they determined the outlook for all of Banner's long-term ratings is Stable.