Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table presents the notional amounts and fair values of derivative positions:

	At December 31, 2020								At December 31, 2019
	Asset Derivatives				Liability Derivatives				Asset Derivatives				Liability Derivatives
(In thousands)	Notional Amounts		Fair Value		Notional Amounts		Fair Value		Notional Amounts		Fair Value		Notional Amounts		Fair Value
Designated as hedging instruments:
Interest rate derivatives (1)	$	1,000,000	$	39,641	$	25,000	$	103	$	1,225,000	$	11,855	$	300,000	$	3,153
Not designated as hedging instruments:
Interest rate derivatives (1)	4,533,441		292,096		4,356,339		11,874		4,869,139		133,455		4,090,522		9,732
Mortgage banking derivatives (2)	40,771		855		—		—		27,873		329		57,000		110
Other (3)	108,987		264		360,497		377		76,544		398		275,279		818
Total not designated as hedging instruments	4,683,199		293,215		4,716,836		12,251		4,973,556		134,182		4,422,801		10,660
Gross derivative instruments, before netting	$	5,683,199	332,856		$	4,741,836	12,354		$	6,198,556	146,037		$	4,722,801	13,813
Less: Master netting agreements			7,522				7,522				4,779				4,779
Cash collateral			33,043				4,485				8,100				1,871
Total derivative instruments, after netting			$	292,291			$	347			$	133,158			$	7,163

Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following table presents fair value positions transitioned from gross to net upon applying counterparty netting agreements:

	At December 31, 2020
(In thousands)	Gross Amount		Offset Amount		Net Amount on Balance Sheet		Amounts Not Offset		Net Amounts
Asset derivatives	$	40,565	$	40,565	$	—	$	785	$	785
Liability derivatives	12,007		12,007		—		1,247		1,247
	At December 31, 2019
(In thousands)	Gross Amount		Offset Amount		Net Amount on Balance Sheet		Amounts Not Offset		Net Amounts
Asset derivatives	$	13,012	$	12,879	$	133	$	299	$	432
Liability derivatives	6,710		6,650		60		329		389

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following tables present the income statement effect of derivatives designated as hedges and additional information related to a fair value hedging adjustment:

	Recognized In	Years ended December 31,
(In thousands)	Net Interest Income	2020		2019		2018
Fair value hedges: (1)
Recognized on derivatives	Long-term debt	$	30,693	$	17,486	$	—
Recognized on hedged items	Long-term debt	(30,693)		(17,486)		—
Net recognized on fair value hedges		$	—	$	—	$	—
Cash flow hedges:
Interest rate derivatives	Long-term debt	$	8,206	$	4,241	$	6,557
Interest rate derivatives	Interest and fees on loans and leases	(6,373)		1,314		—
Net recognized on cash flow hedges		$	1,833	$	5,555	$	6,557

Consolidated Balance Sheet Line Item in Which Hedged Item is Located	Carrying Amount of Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Included in Carrying Amount (1)
	At December 31,				At December 31,
(In thousands)	2020		2019		2020		2019
Long-term debt	$	344,164	$	317,486	$	44,164	$	17,486

Other Derivatives Not Designated For Hedge Accounting

The following table presents the income statement effect of derivatives not designated as hedging instruments:

	Recognized In	Years ended December 31,
(In thousands)	Non-interest Income	2020		2019		2018
Interest rate derivatives	Other income	$	11,068	$	8,477	$	10,376
Mortgage banking derivatives	Mortgage banking activities	636		(6)		(378)
Other	Other income	(1,696)		1,100		2,391
Total not designated as hedging instruments		$	10,008	$	9,571	$	12,389