Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts and Estimated Fair Values of Interest Rate Derivative Contracts Outstanding

The notional amounts and estimated fair values of interest rate derivative contracts are presented in the following table. The fair values of interest rate derivative contracts are estimated utilizing internal valuation models with observable market data inputs, or as determined by the Chicago Mercantile Exchange (“CME”) for centrally cleared derivative contracts. CME rules legally characterize variation margin payments for centrally cleared derivatives as settlements of the derivatives' exposure rather than collateral. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Variation margin, as determined by the CME, is settled daily. As a result, derivative contracts that clear through the CME have an estimated fair value of zero as of March 31, 2018 and December 31, 2017.

	March 31, 2018					December 31, 2017
	Notional Amount		Estimated Fair Value			Notional Amount		Estimated Fair Value
Derivatives designated as hedges of fair value:
Financial institution counterparties:
Loan/lease interest rate swaps – assets	$	11,904	$	286		$	13,679	$	242
Loan/lease interest rate swaps – liabilities	10,141		(445		)	11,147		(593		)
Non-hedging interest rate derivatives:
Financial institution counterparties:
Loan/lease interest rate swaps – assets	615,433		3,416			430,449		1,418
Loan/lease interest rate swaps – liabilities	520,466		(8,461		)	541,496		(12,820		)
Loan/lease interest rate caps – assets	121,976		906			114,619		480
Customer counterparties:
Loan/lease interest rate swaps – assets	491,786		12,204			541,496		17,882
Loan/lease interest rate swaps – liabilities	596,473		(12,846		)	430,449		(4,861		)
Loan/lease interest rate caps – liabilities	121,976		(906		)	114,619		(480		)

Schedule of Weighted-Average Rates Paid and Received for Interest Rate Swaps Outstanding

The weighted-average rates paid and received for interest rate swaps outstanding at March 31, 2018 were as follows:

	Weighted-Average
	Interest Rate Paid		Interest Rate Received
Interest rate swaps:
Fair value hedge loan/lease interest rate swaps	3.27	%	1.77	%
Non-hedging interest rate swaps – financial institution counterparties	3.96	%	3.28	%
Non-hedging interest rate swaps – customer counterparties	3.35	%	4.06	%

Schedule of Notional Amounts and Estimated Fair Values of Commodity Derivative Positions

The notional amounts and estimated fair values of non-hedging commodity swap and option derivative positions outstanding are presented in the following table. We obtain dealer quotations and use internal valuation models with observable market data inputs to value our commodity derivative positions.

		March 31, 2018				December 31, 2017
	Notional Units	Notional Amount	Estimated Fair Value			Notional Amount	Estimated Fair Value
Financial institution counterparties:
Oil – assets	Barrels	462	$	1,676		253	$	193
Oil – liabilities	Barrels	2,663	(19,122		)	2,731	(13,448		)
Natural gas – assets	MMBTUs	6,963	984			5,927	1,399
Natural gas – liabilities	MMBTUs	6,230	(591		)	3,917	(326		)
Customer counterparties:
Oil – assets	Barrels	2,699	19,301			2,731	13,709
Oil – liabilities	Barrels	426	(1,668		)	253	(187		)
Natural gas – assets	MMBTUs	6,133	602			3,917	340
Natural gas – liabilities	MMBTUs	7,060	(975		)	5,927	(1,366		)

Notional Amounts and Fair Values of Open Foreign Currency Forward Contracts

The notional amounts and fair values of open foreign currency forward contracts were as follows:

		March 31, 2018				December 31, 2017
	Notional Currency	Notional Amount	Estimated Fair Value			Notional Amount	Estimated Fair Value
Financial institution counterparties:
Forward contracts – assets	EUR	5,110	$	167		4,014	$	77
Forward contracts – assets	GBP	832	8			127	1
Forward contracts – assets	AUD	59	1			—	—
Forward contracts – liabilities	EUR	—	—			4,846	(37		)
Forward contracts – liabilities	CAD	23,228	(68		)	25,413	(142		)
Forward contracts – liabilities	GBP	453	(5		)	1,178	(9		)
Forward contracts – liabilities	AUD	58	—			—	—
Customer counterparties:
Forward contracts – assets	EUR	—	—			3,867	58
Forward contracts – assets	CAD	23,170	136			25,282	279
Forward contracts – assets	GBP	88	1			—	—
Forward contracts – liabilities	EUR	4,041	(135		)	4,041	(51		)
Forward contracts – liabilities	GBP	—	—			127	—

Schedule of Amounts Related to Interest Rate Derivatives Designated as Hedges of Fair Value

Amounts included in the consolidated statements of income related to interest rate derivatives designated as hedges of fair value were as follows:

	Three Months Ended   March 31,
	2018			2017
Commercial loan/lease interest rate swaps:
Amount of gain (loss) included in interest income on loans	$	(42	)	$	(245	)
Amount of (gain) loss included in other non-interest expense	—			(1		)

Schedule of Amounts Related to Non-Hedging Interest Rate and Commodity Derivatives

Amounts included in the consolidated statements of income related to non-hedging interest rate, commodity and foreign currency derivative instruments are presented in the table below.

	Three Months Ended   March 31,
	2018			2017
Non-hedging interest rate derivatives:
Other non-interest income	$	1,488		$	370
Other non-interest expense	(21		)	(1		)
Non-hedging commodity derivatives:
Other non-interest income	90			52
Non-hedging foreign currency derivatives:
Other non-interest income	59			9