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Subsequent Events | 12 Months Ended
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Dec. 31, 2016
Subsequent Events [Abstract] |
Subsequent Events [Text Block] | Subsequent Events On January 9, 2017, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Pacific Continental Corporation, an Oregon corporation whose wholly-owned banking subsidiary is Pacific Continental Bank. Per the terms of the Merger Agreement, Pacific Continental shareholders will have the right to receive, in respect of each share of common stock of Pacific Continental, a number of common shares of Columbia equal to the exchange ratio of 0.6430, subject to any adjustments set forth in the Merger Agreement. The merger transaction is valued at approximately $644.1 million. Consummation of the merger is subject to customary closing conditions, including, among others, shareholder and regulatory approval. The Merger Agreement contains certain termination rights and provides that, upon the termination of the Merger Agreement under specified circumstances, Pacific Continental will be required to pay us a termination fee of $18.75 million. On January 12, 2017, all outstanding shares of Series B Preferred Stock were converted to Company common stock.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
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