Subsequent Event

6 Months Ended

Jun. 30, 2014

Subsequent Event [Line Items]

Subsequent Events [Text Block]

Subsequent Event

On July 23, 2014, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Intermountain Community Bancorp, an Idaho corporation (“Intermountain”). The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, Intermountain will merge with and into Columbia (the “Merger”), with Columbia continuing as the surviving corporation. Immediately after the Merger, Panhandle State Bank, an Idaho state-chartered bank and wholly-owned subsidiary of Intermountain, will merge with and into our wholly-owned subsidiary, Columbia Bank. The closing of the transaction is subject to the satisfaction of certain customary conditions, including, among other things, the receipt of required regulatory approvals and the approval of Intermountain’s shareholders. Under the terms of the merger agreement, Intermountain shareholders are entitled to receive in respect of each share of Intermountain common stock, consideration in the form of cash, Columbia common stock or a unit consisting of a mix of 0.6426 of a share of Columbia common stock and $2.2930 in cash. Based on Columbia’s closing stock price as of July 23, 2014, the merger consideration was valued at $121.5 million, or approximately $18.22 per Intermountain share. The value of the merger consideration will fluctuate based on the value of Columbia’s stock until closing.