Offsetting Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2016

Offsetting Assets and Liabilities [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

	September 30, 2016
(In thousands)							Gross amounts not offset in the balance sheet
Description	Gross amounts recognized		Gross amounts offset in the balance sheet		Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
Assets:
Federal funds sold and security resell agreements	$	1,675,645	$	—	$	1,675,645	$	—		$	—		$	1,675,645
Derivatives (included in other assets)	129,065		—		129,065		(20,419		)	(83		)	108,563
	$	1,804,710	$	—	$	1,804,710	$	(20,419	)	$	(83	)	$	1,784,208
Liabilities:
Federal funds and other short-term borrowings	$	1,115,561	$	—	$	1,115,561	$	—		$	—		$	1,115,561
Derivatives (included in other liabilities)	111,929		—		111,929		(20,419		)	(86,478		)	5,032
	$	1,227,490	$	—	$	1,227,490	$	(20,419	)	$	(86,478	)	$	1,120,593

	December 31, 2015
(In thousands)							Gross amounts not offset in the balance sheet
Description	Gross amounts recognized		Gross amounts offset in the balance sheet		Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
Assets:
Federal funds sold and security resell agreements	$	619,758	$	—	$	619,758	$	—		$	—		$	619,758
Derivatives (included in other assets)	77,638		—		77,638		(6,990		)	—			70,648
	$	697,396	$	—	$	697,396	$	(6,990	)	$	—		$	690,406
Liabilities:
Federal funds and other short-term borrowings	$	346,987	$	—	$	346,987	$	—		$	—		$	346,987
Derivatives (included in other liabilities)	72,568		—		72,568		(6,990		)	(60,923		)	4,655
	$	419,555	$	—	$	419,555	$	(6,990	)	$	(60,923	)	$	351,642

	September 30, 2016					December 31, 2015
(In thousands)	Carrying value		Estimated fair value		Level	Carrying value		Estimated fair value		Level
Financial assets:
HTM investment securities	$	715,279	$	717,822	2	$	545,648	$	552,088	2
Loans and leases (including loans held for sale), net of allowance	42,102,822		42,100,277		3	40,193,374		39,535,365		3
Financial liabilities:
Time deposits	2,516,493		2,517,487		2	2,130,680		2,129,742		2
Foreign deposits	118,762		118,772		2	294,391		294,321		2
Long-term debt	570,385		602,624		2	812,366		838,796		2