Acquisitions	9 Months Ended
Sep. 30, 2015
Business Combinations [Abstract]
Acquisitions	2. Acquisitions On August 27, 2012, M&T announced that it had entered into a definitive agreement with Hudson City Bancorp, Inc. (“Hudson City”), headquartered in Paramus, New Jersey, under which Hudson City would be acquired by M&T. Pursuant to the terms of the agreement, Hudson City shareholders will receive consideration for each common share of Hudson City in an amount valued at .08403 of an M&T share in the form of either M&T common stock or cash, based on the election of each Hudson City shareholder, subject to proration as specified in the merger agreement (which provides for an aggregate split of total consideration of 60% common stock of M&T and 40% cash). As of September 30, 2015, total consideration to be paid was valued at approximately $5.3 billion. The merger has received the approval of the common shareholders of M&T and Hudson City. M&T announced on September 30, 2015 that it had received the approval of the Federal Reserve to acquire Hudson City and on October 9, 2015 M&T received approval of the proposed acquisition from the New York State Department of Financial Services. The transaction is expected to be completed on or about November 1, 2015 pending the satisfaction of customary closing conditions. At September 30, 2015, Hudson City had $35.1 billion of assets, including $19.2 billion of loans and $8.3 billion of investment securities, and $30.3 billion of liabilities, including $17.9 billion of deposits.

Acquisitions

9 Months Ended

Sep. 30, 2015

2. Acquisitions

On August 27, 2012, M&T announced that it had entered into a definitive agreement with Hudson City Bancorp, Inc. (“Hudson City”), headquartered in Paramus, New Jersey, under which Hudson City would be acquired by M&T. Pursuant to the terms of the agreement, Hudson City shareholders will receive consideration for each common share of Hudson City in an amount valued at .08403 of an M&T share in the form of either M&T common stock or cash, based on the election of each Hudson City shareholder, subject to proration as specified in the merger agreement (which provides for an aggregate split of total consideration of 60% common stock of M&T and 40% cash). As of September 30, 2015, total consideration to be paid was valued at approximately $5.3 billion.

The merger has received the approval of the common shareholders of M&T and Hudson City. M&T announced on September 30, 2015 that it had received the approval of the Federal Reserve to acquire Hudson City and on October 9, 2015 M&T received approval of the proposed acquisition from the New York State Department of Financial Services. The transaction is expected to be completed on or about November 1, 2015 pending the satisfaction of customary closing conditions. At September 30, 2015, Hudson City had $35.1 billion of assets, including $19.2 billion of loans and $8.3 billion of investment securities, and $30.3 billion of liabilities, including $17.9 billion of deposits.