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Derivative Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Summary of Notional Amounts and Fair Values of Derivative Financial Instruments
The following table presents a summary of the notional amounts and fair values of derivative financial instruments:
 September 30, 2021December 31, 2020
 Notional
Amount
Asset
(Liability)
Fair Value
Notional
Amount
Asset
(Liability)
Fair Value
 (in thousands)
Interest Rate Locks with Customers
Positive fair values$304,893 $2,990 $382,903 $8,034 
Negative fair values3,366 (18)3,154 (35)
Forward Commitments
Positive fair values53,000 630 — — 
Negative fair values  292,262 (2,263)
Interest Rate Swaps with Customers
Positive fair values3,205,646 183,850 3,834,062 330,951 
Negative fair values701,719 (2,633)45,640 (2)
Interest Rate Swaps with Dealer Counterparties
Positive fair values 701,719 2,633 45,640 
Negative fair values3,205,646 (94,235)3,834,062 (165,205)
Interest Rate Swaps used in Cash Flow Hedges
Positive fair values400,000 377 — — 
Negative fair values100,000 (150)— — 
Foreign Exchange Contracts with Customers
Positive fair values9,782 293 1,121 
Negative fair values649 (13)5,963 (275)
Foreign Exchange Contracts with Correspondent Banks
Positive fair values1,525 26 6,372 318 
Negative fair values10,554 (284)1,422 (5)
Summary of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income
The following table presents the effect of fair value and cash flow hedge accounting on AOCI:

Amount of Gain (Loss) Recognized in OCI on Derivative Amount of Gain (Loss) Recognized in OCI Included ComponentAmount of Gain or (Loss) Recognized in OCI Excluded ComponentLocation of Gain or (Loss) Recognized from AOCI into IncomeAmount of Gain Reclassified from AOCI into Income Amount of Gain Reclassified from AOCI into Income Included ComponentAmount of Gain or (Loss) Reclassified from AOCI into Income Excluded Component
(in thousands)
Derivatives in Cash Flow Hedging Relationships: 
Three months ended September 30, 2021
Interest Rate Products$(280)$(280)$— Interest income$873 $873 $— 
Nine months ended September 30, 2021
Interest Rate Products$1,215 $1,215 $— Interest income$1,894 $1,894 $— 
The following table presents the effect of fair value and cash flow hedge accounting:
Consolidated Statements of Income Classification
Interest Income
Three months endedNine months ended
September 30, 2021September 30, 2021
(in thousands)
Total amounts of income line items presented in the consolidated statements of income in which the effects of fair value or cash flow hedges are recorded$873 $1,894 
The effects of fair value and cash flow hedging:
Gain or (loss) on cash flow hedging relationships— — 
Interest contracts:
Amount of gain reclassified from AOCI into income873 1,894 
Amount of gain or (loss) reclassified from AOCI into income as a result that a forecasted transaction is no longer probable of occurring— — 
Amount of Gain Reclassified from AOCI into Income - Included Component873 1,894 
Amount of Gain or (Loss) Reclassified from AOCI into Income - Excluded Component— — 
Summary of Fair Value Gains and Losses on Derivative Financial Instruments
The following table presents a summary of the net fair value gains (losses) on derivative financial instruments:
Consolidated Statements of Income ClassificationThree months ended September 30Nine months ended September 30
 2021202020212020
        (in thousands)
Mortgage banking derivatives (1)
Mortgage banking income$228 $1,783 $(2,134)$9,527 
Interest rate swapsOther expense1,069 (12)861 70 
Foreign exchange contractsOther income(17)25 (21)42 
Net fair value gains/(losses) on derivative financial instruments$1,280 $1,796 $(1,294)$9,639 
(1) Includes interest rate locks with customers and forward commitments.
Summary of Corporation's Mortgage Loans Held for Sale The following table presents a summary of mortgage loans held for sale and the impact of the fair value election on the consolidated financial statements as of the periods shown:
September 30,
2021
December 31,
2020
 (in thousands)
Amortized cost (1)
$42,361 $80,662 
Fair value43,123 83,886 
(1) Cost basis of mortgage loans held for sale represents the unpaid principal balance.
Summary of Offsetting Derivative Assets
The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets:
Gross AmountsGross Amounts Not Offset
Recognized on the Consolidated
on the Balance Sheets
ConsolidatedFinancialCashNet
Balance Sheets
Instruments(1)
Collateral (2)
Amount
(in thousands)
September 30, 2021
Interest rate swap derivative assets$186,860 $(4,205)$ $182,655 
Foreign exchange derivative assets with correspondent banks26 (26)  
Total $186,886 $(4,231)$ $182,655 
Interest rate swap derivative liabilities$97,018 $(3,978)$(90,620)$2,420 
Foreign exchange derivative liabilities with correspondent banks284 (26) 258 
Total$97,302 $(4,004)$(90,620)$2,678 
December 31, 2020
Interest rate swap derivative assets$330,951 $(2)$— $330,949 
Foreign exchange derivative assets with correspondent banks318 (5)— 313 
Total $331,269 $(7)$— $331,262 
Interest rate swap derivative liabilities$165,205 $(2)$(165,203)$— 
Foreign exchange derivative liabilities with correspondent banks(5)— — 
Total$165,210 $(7)$(165,203)$— 

(1)For interest rate swap assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.
(2)Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate swap transactions and foreign exchange contracts with financial institution counterparties. Interest rate swaps with customers are collateralized by the same collateral securing the underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.
Summary of Offsetting Derivative Liabilities
The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets:
Gross AmountsGross Amounts Not Offset
Recognized on the Consolidated
on the Balance Sheets
ConsolidatedFinancialCashNet
Balance Sheets
Instruments(1)
Collateral (2)
Amount
(in thousands)
September 30, 2021
Interest rate swap derivative assets$186,860 $(4,205)$ $182,655 
Foreign exchange derivative assets with correspondent banks26 (26)  
Total $186,886 $(4,231)$ $182,655 
Interest rate swap derivative liabilities$97,018 $(3,978)$(90,620)$2,420 
Foreign exchange derivative liabilities with correspondent banks284 (26) 258 
Total$97,302 $(4,004)$(90,620)$2,678 
December 31, 2020
Interest rate swap derivative assets$330,951 $(2)$— $330,949 
Foreign exchange derivative assets with correspondent banks318 (5)— 313 
Total $331,269 $(7)$— $331,262 
Interest rate swap derivative liabilities$165,205 $(2)$(165,203)$— 
Foreign exchange derivative liabilities with correspondent banks(5)— — 
Total$165,210 $(7)$(165,203)$— 

(1)For interest rate swap assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.
(2)Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate swap transactions and foreign exchange contracts with financial institution counterparties. Interest rate swaps with customers are collateralized by the same collateral securing the underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.