Borrowings (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019
Amount outstanding	$	62,363		$	—		$	62,363
Weighted-average interest rate		0.14	%		—			0.14	%
For the year ended December 31, 2019
Highest amount at a month-end	$	3,402,566		$	5,000,000
Daily-average amount outstanding		260,322			799,068		$	1,059,390
Weighted-average interest rate		1.86	%		2.49	%		2.34	%
At December 31, 2018
Amount outstanding	$	198,378		$	4,200,000		$	4,398,378
Weighted-average interest rate		1.68	%		2.63	%		2.58	%
For the year ended December 31, 2018
Highest amount at a month-end	$	2,654,416		$	4,200,000
Daily-average amount outstanding		261,200			69,465		$	330,665
Weighted-average interest rate		1.49	%		2.16	%		1.63	%
At December 31, 2017
Amount outstanding	$	175,099		$	—		$	175,099
Weighted-average interest rate		0.92	%		—			0.92	%
For the year ended December 31, 2017
Highest amount at a month-end	$	204,977		$	1,500,000
Daily-average amount outstanding		188,459			16,164		$	204,623
Weighted-average interest rate		0.69	%		1.27	%		0.74	%

Lines of Credit Under Formal Agreements

At December 31, 2019, M&T Bank had lines of credit under formal agreements as follows:

	(In thousands)
Outstanding borrowings	$	1,869
Unused		32,578,083

Long-term Borrowings

Long-term borrowings were as follows:

	December 31,
	2019		2018
	(In thousands)
Senior notes of M&T:
Variable rate due 2023	$	249,756	$	249,688
3.55% due 2023		520,454		506,021
Senior notes of M&T Bank:
Variable rate due 2021		349,893		349,794
Variable rate due 2022		249,758		249,658
2.25% due 2019		—		645,801
2.05% due 2020		749,254		737,793
2.10% due 2020		749,864		741,965
2.625% due 2021		654,136		646,301
2.50% due 2022		652,714		634,525
2.90% due 2025		749,572		749,488
Advances from FHLB:
Fixed rates		1,815		576,446
Agreements to repurchase securities		101,679		409,154
Subordinated notes of M&T Bank:
Variable rate due 2020		409,361		409,361
Variable rate due 2021		500,000		500,000
3.40% due 2027		514,353		481,692
Junior subordinated debentures of M&T associated with    preferred capital securities:
Fixed rates:
BSB Capital Trust I — 8.125%, due 2028		15,728		15,705
Provident Trust I — 8.29%, due 2028		28,235		27,489
Southern Financial Statutory Trust I — 10.60%, due 2030		6,770		6,713
Variable rates:
First Maryland Capital I — due 2027		147,871		147,333
First Maryland Capital II — due 2027		149,943		149,280
Allfirst Asset Trust — due 2029		96,930		96,785
BSB Capital Trust III — due 2033		15,464		15,464
Provident Statutory Trust III — due 2033		55,867		55,143
Southern Financial Capital Trust III — due 2033		8,236		8,141
Other		8,533		35,174
	$	6,986,186	$	8,444,914

Maturity of Long-term Borrowings

Long-term borrowings at December 31, 2019 mature as follows:

	(In thousands)
Year ending December 31:
2020	$	2,010,251
2021		1,506,667
2022		907,794
2023		770,211
2024		479
Later years		1,790,784
	$	6,986,186