Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value Of Derivative Financial Instruments Designated As Cash Flow Hedges

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

	At December 31, 2017								At December 31, 2016
	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:
Positions subject to master netting agreements (1)
Interest rate derivatives	$	325,000	$	2,770	$	—	$	—	$	225,000	$	3,270	$	100,000	$	792
Not designated as hedging instruments:
Positions subject to master netting agreements (1)
Interest rate derivatives	2,791,760		5,977		721,048		1,968		1,943,485		32,226		1,242,937		24,388
Mortgage banking derivatives (2)	28,497		421		39,230		110		103,440		3,084		59,895		711
Other	7,914		258		30,328		419		10,634		231		14,265		120
Positions not subject to master netting agreements
Interest rate derivatives	1,366,299		23,009		2,146,518		25,631		1,734,679		38,668		1,451,762		19,001
RPAs	93,713		80		116,882		111		86,037		139		87,273		166
Other	—		—		2,073		184		1,438		19		181		11
Total not designated as hedging instruments	4,288,183		29,745		3,056,079		28,423		3,879,713		74,367		2,856,313		44,397
Gross derivative instruments, before netting	$	4,613,183	32,515		$	3,056,079	28,423		$	4,104,713	77,637		$	2,956,313	45,189
Less: Legally enforceable master netting agreements			2,245				2,245				24,252				24,254
Less: Cash collateral posted			6,704				—				11,475				600
Total derivative instruments, after netting			$	23,566			$	26,178			$	41,910			$	20,335

(1) One of Webster's counterparty relationships was impacted by a Chicago Mercantile Exchange rulebook amendment, resulting in the presentation of that relationship on a settlement basis, as a single unit of account.

(2)

Notional amounts include mandatory forward commitments of $39.0 million, while notional amounts do not include approved floating rate commitments of $11.3 million, at December 31, 2017.

Interest Rate Swaps And Caps Not Designated For Hedge Accounting

Changes in the fair value of derivatives not qualifying for hedge accounting treatment are reported as a component of other non-interest income in the accompanying Consolidated Statements of Income as follows:

	Years ended December 31,
(In thousands)	2017			2016			2015
Interest rate derivatives	$	2,702		$	8,668		$	4,361
RPA	242			(361		)	(33		)
Mortgage banking derivatives	(2,062		)	1,553			801
Other	(768		)	(67		)	(63		)
Total impact on other non-interest income	$	114		$	9,793		$	5,066

Offsetting Assets and Liabilities

The following table is presented on a gross basis, prior to the application of counterparty netting agreements:

	At December 31, 2017								At December 31, 2016
(In thousands)	Gross Amount		Relationship Offset		Cash Collateral Offset		Net Amount		Gross Amount		Relationship Offset		Cash Collateral Offset		Net Amount
Derivative instrument assets
Hedged Accounting	$	2,770	$	91	$	2,679	$	—	$	3,270	$	2,335	$	935	$	—
Non-Hedged Accounting	6,222		2,154		4,025		43		32,457		21,917		10,540		—
Total	$	8,992	$	2,245	$	6,704	$	43	$	35,727	$	24,252	$	11,475	$	—
Derivative instrument liabilities
Hedged Accounting	$	—	$	—	$	—	$	—	$	792	$	792	$	—	$	—
Non-Hedged Accounting	2,387		2,245		—		142		24,508		23,462		600		446
Total	$	2,387	$	2,245	$	—	$	142	$	25,300	$	24,254	$	600	$	446