Borrowings (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Amounts and Interest Rates of Short-term Borrowings

The amounts and interest rates of short-term borrowings were as follows:

	Federal Funds Purchased and Repurchase Agreements			Other Short-term Borrowings			Total
	(Dollars in thousands)
At December 31, 2015
Amount outstanding	$	150,546		$	1,981,636		$	2,132,182
Weighted-average interest rate		0.06	%		0.43	%		0.40	%
For the year ended December 31, 2015
Highest amount at a month-end	$	202,951		$	1,989,257
Daily-average amount outstanding		187,167			360,838		$	548,005
Weighted-average interest rate		0.08	%		0.43	%		0.31	%
At December 31, 2014
Amount outstanding	$	192,676			—		$	192,676
Weighted-average interest rate		0.07	%		—			0.07	%
For the year ended December 31, 2014
Highest amount at a month-end	$	280,350			—
Daily-average amount outstanding		214,736			—		$	214,736
Weighted-average interest rate		0.05	%		—			0.05	%
At December 31, 2013
Amount outstanding	$	260,455			—		$	260,455
Weighted-average interest rate		0.04	%		—			0.04	%
For the year ended December 31, 2013
Highest amount at a month-end	$	563,879			—
Daily-average amount outstanding		390,034			—		$	390,034
Weighted-average interest rate		0.11	%		—			0.11	%

Lines of Credit Under Formal Agreements

At December 31, 2015, the Company had lines of credit under formal agreements as follows:

	M&T Bank		Wilmington Trust, N.A.
	(In thousands)
Outstanding borrowings	$	3,108,243	$	—
Unused		29,189,620		147,739

Long-term Borrowings

Long-term borrowings were as follows:

	December 31,
	2015		2014
	(In thousands)
Senior notes of M&T Bank:
Variable rate due 2016	$	300,000	$	300,000
Variable rate due 2017		550,000		550,000
1.25% due 2017		499,984		499,969
1.40% due 2017		749,851		749,756
1.45% due 2018		503,527		503,118
2.25% due 2019		648,628		648,243
2.30% due 2019		749,219		748,965
2.10% due 2020		749,650		—
2.90% due 2025		749,236		—
Advances from FHLB:
Fixed rates		1,158,216		1,161,514
Agreements to repurchase securities		1,899,281		1,400,000
Subordinated notes of Wilmington Trust Corporation (a wholly owned subsidiary of M&T):
8.50% due 2018		213,417		218,883
Subordinated notes of M&T Bank:
6.625% due 2017		419,800		428,627
5.585% due 2020, variable rate commenced 2015		409,361		400,846
5.629% due 2021, variable rate commencing 2016		518,797		538,961
Junior subordinated debentures of M&T associated with preferred capital securities:
Fixed rates:
M&T Capital Trust I — 8.234%, due 2027		—		154,640
M&T Capital Trust II — 8.277%, due 2027		—		103,093
M&T Capital Trust III — 9.25%, due 2027		—		65,784
BSB Capital Trust I — 8.125%, due 2028		15,635		15,612
Provident Trust I — 8.29%, due 2028		25,817		25,405
Southern Financial Statutory Trust I — 10.60%, due 2030		6,583		6,550
Variable rates:
First Maryland Capital I — due 2027		145,717		145,179
First Maryland Capital II — due 2027		147,291		146,627
Allfirst Asset Trust — due 2029		96,349		96,204
BSB Capital Trust III — due 2033		15,464		15,464
Provident Statutory Trust III — due 2033		53,244		52,692
Southern Financial Capital Trust III — due 2033		7,889		7,816
Other		20,902		23,011
	$	10,653,858	$	9,006,959

Maturity of Long-term Borrowings

Long-term borrowings at December 31, 2015 mature as follows:

	(In thousands)
Year ending December 31:
2016	$	1,106,613
2017		3,452,420
2018		719,574
2019		2,306,326
2020		1,272,561
Later years		1,796,364
	$	10,653,858