Shareholders' equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Issued and Outstanding Preferred Stock

Issued and outstanding preferred stock of M&T as of December 31, 2017 and 2016 is presented below:

	Shares Issued and Outstanding		Carrying Value
	(Dollars in thousands)
Series A (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		230,000	$	230,000
Series C (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		151,500	$	151,500
Series E (b)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		350,000	$	350,000
Series F (c)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $10,000 liquidation preference per share		50,000	$	500,000

(a) Dividends, if declared, are paid at 6.375%. Warrants to purchase M&T common stock at $73.77 per share issued in connection with the Series A preferred stock expire December 23, 2018 and totaled 257,008 at December 31, 2017.

(b) Dividends, if declared, are paid semi-annually at a rate of 6.45% through February 14, 2024 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 361 basis points. The shares are redeemable in whole or in part on or after February 15, 2024. Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

(c) Dividends, if declared, are paid semi-annually at a rate of 5.125% through October 31, 2026 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 352 basis points.  The shares are redeemable in whole or in part on or after November 1, 2026.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.