Offsetting Assets and Liabilities Gross and net information for selecting financial instruments (Tables)

12 Months Ended

Dec. 31, 2016

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

	December 31, 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	$	568,334	$	—	$	568,334	$	—		$	—		$	568,334
Derivatives (included in other assets)	64,195		—		64,195		(17,118		)	(162		)	46,915
	$	632,529	$	—	$	632,529	$	(17,118	)	$	(162	)	$	615,249
Liabilities:
Federal funds and other short-term borrowings	$	827,269	$	—	$	827,269	$	—		$	—		$	827,269
Derivatives (included in other liabilities)	59,221		—		59,221		(17,118		)	(16,570		)	25,533
	$	886,490	$	—	$	886,490	$	(17,118	)	$	(16,570	)	$	852,802

	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

	December 31, 2016					December 31, 2015
(In thousands)	Carrying value		Estimated fair value		Level	Carrying value		Estimated fair value		Level
Financial assets:
HTM investment securities	$	867,904	$	850,473	2	$	545,648	$	552,088	2
Loans and leases (including loans held for sale), net of allowance	42,253,677		42,110,544		3	40,193,374		39,535,365		3
Financial liabilities:
Time deposits	2,756,810		2,743,885		2	2,130,680		2,129,742		2
Foreign deposits	—		—		2	294,391		294,321		2
Other short-term borrowings	500,000		500,000		2	—		—		2
Long-term debt (less fair value hedges)	534,850		551,881		2	812,366		838,796		2