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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block]

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of June 30, 2018 (in thousands):

		Total				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government agency debentures		$	28,750			$	—			$	28,750			$	—
U.S. government agency residential mortgage-backed securities		1,605,001				—				1,605,001				—
Municipal and other tax-exempt securities		70,606				—				70,606				—
Asset-backed securities		193,271				—				193,271				—
Other trading securities		11,987				—				11,987				—
Total trading securities		1,909,615				—				1,909,615				—
Available for sale securities:
U.S. Treasury		490				490				—				—
Municipal and other tax-exempt securities		10,697				—				8,667				2,030
U.S. government agency residential mortgage-backed securities		5,304,560				—				5,304,560				—
Privately issued residential mortgage-backed securities		83,224				—				83,224				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,738,451				—				2,738,451				—
Other debt securities		25,444				—				24,973				471
Total available for sale securities		8,162,866				490				8,159,875				2,501
Fair value option securities – U.S. government agency residential mortgage-backed securities		482,227				—				482,227				—
Residential mortgage loans held for sale		223,301				—				209,058				14,243
Mortgage servicing rights1		278,719				—				—				278,719
Derivative contracts, net of cash collateral2		373,373				21,056				352,317				—
Liabilities:
Derivative contracts, net of cash collateral2		234,856				17,214				217,642				—

¹  A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 6, Mortgage Banking Activities.

²  See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate and agricultural derivative contacts, net of cah margin. Derivative contacts in liability positions that were valued using quoted prices in active markets for identical instruments are exchange-traded energy and interest rate derivative contracts, net of cash margin.

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2017 (in thousands):

		Total				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government agency debentures		$	21,196			$	—			$	21,196			$	—
U.S. government agency residential mortgage-backed securities		392,673				—				392,673				—
Municipal and other tax-exempt securities		13,559				—				13,559				—
Asset-backed securities		23,885				—				23,885				—
Other trading securities		11,363				—				11,363				—
Total trading securities		462,676				—				462,676				—
Available for sale securities:
U.S. Treasury		1,000				1,000				—				—
Municipal and other tax-exempt securities		27,080				—				22,278				4,802
U.S. government agency residential mortgage-backed securities		5,309,152				—				5,309,152				—
Privately issued residential mortgage-backed securities		93,221				—				93,221				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,834,961				—				2,834,961				—
Other debt securities		25,481				—				25,009				472
Perpetual preferred stock		15,767				—				15,767				—
Equity securities and mutual funds		14,916				—				14,916				—
Total available for sale securities		8,321,578				1,000				8,315,304				5,274
Fair value option securities – U.S. government agency residential mortgage-backed securities		755,054				—				755,054				—
Residential mortgage loans held for sale		221,378				—				209,079				12,299
Mortgage servicing rights1		252,867				—				—				252,867
Derivative contracts, net of cash collateral2		220,502				8,179				212,323				—
Liabilities:
Derivative contracts, net of cash collateral2		171,963				—				171,963				—

¹  A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 6, Mortgage Banking Activities.

²  See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets for identical instruments (Level 1) are exchange-traded interest rate, energy and agricultural derivative contacts. Derivative contracts in liability positions that were valued using quoted prices in active markets for identical instruments (Level 1) are exchange-traded interest rate and energy derivative contracts, fully offset by cash margin.

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of June 30, 2017 (in thousands):

		Total				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government agency debentures		$	20,954			$	—			$	20,954			$	—
U.S. government agency residential mortgage-backed securities		365,171				—				365,171				—
Municipal and other tax-exempt securities		45,444				—				45,444				—
Other trading securities		9,845				—				9,845				—
Total trading securities		441,414				—				441,414				—
Available for sale securities:
U.S. Treasury		998				998				—				—
Municipal and other tax-exempt securities		32,765				—				28,110				4,655
U.S. government agency residential mortgage-backed securities		5,382,377				—				5,382,377				—
Privately issued residential mortgage-backed securities		103,383				—				103,383				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,782,070				—				2,782,070				—
Other debt securities		4,152				—				—				4,152
Perpetual preferred stock		16,568				—				16,568				—
Equity securities and mutual funds		18,728				3,516				15,212				—
Total available for sale securities		8,341,041				4,514				8,327,720				8,807
Fair value option securities – U.S. government agency residential mortgage-backed securities		445,169				—				445,169				—
Residential mortgage loans held for sale		287,259				—				274,524				12,735
Mortgage servicing rights1		245,239				—				—				245,239
Derivative contracts, net of cash collateral2		280,289				46,366				233,923				—
Liabilities:
Derivative contracts, net of cash collateral2		285,819				20,915				264,904				—

¹  A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 6, Mortgage Banking Activities.

²  See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets for identical instruments (Level 1) are exchange-traded energy and interest rate derivative contacts. Derivative contracts in liability positions that were valued using quoted prices in active markets for identical instruments (Level 1) are exchange-traded interest rate and agricultural derivative contracts, net cash margin.

Fair Value Assets Measured On Recurring Basis, Significant Unobservable Inputs [Table Text Block]

The following represents the changes for the three and six months ended June 30, 2018 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):

		Available for Sale Securities
		Municipal and other tax-exempt securities				Other debt securities				Residential mortgage loans held for sale
Balance, March 31, 2018		$	1,891			$	472			$	13,871
Transfer to Level 3 from Level 21		—				—				687
Purchases		—				—				—
Proceeds from sales		—				—				(488		)
Redemptions and distributions		—				—				—
Gain (loss) recognized in earnings:
Mortgage banking revenue		—				—				173
Other comprehensive income:
Net change in unrealized gain		139				(1		)		—
Balance, June 30, 2018		$	2,030			$	471			$	14,243

¹ Recurring transfers to Level 3 from Level 2 consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards.

		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Residential mortgage loans held for sale
Balance, December 31, 2017		$	4,802			$	472			$	12,299
Transfer to Level 3 from Level 21		—				—				2,843
Purchases		—				—				—
Proceeds from sales		—				—				(812		)
Redemptions and distributions		(3,045		)		—				—
Gain (loss) recognized in earnings:
Mortgage banking revenue		—				—				(87		)
Other comprehensive income (loss):
Net change in unrealized gain (loss)		273				(1		)		—
Balance, June 30, 2018		$	2,030			$	471			$	14,243

¹ Recurring transfers to Level 3 from Level 2 consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards.

The following represents the changes for the three and six months ended June 30, 2017 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):

		Available for Sale Securities
		Municipal and other tax-exempt securities				Other debt securities				Residential mortgage loans held for sale
Balance, March 31, 2017		$	5,722			$	4,153			$	12,679
Transfer to Level 3 from Level 21		—				—				853
Purchases		—				—				—
Proceeds from sales		—				—				(1,030		)
Redemptions and distributions		(1,100		)		—				—
Gain (loss) recognized in earnings:
Mortgage banking revenue		—				—				233
Other comprehensive income (loss):
Net change in unrealized gain (loss)		33				(1		)		—
Balance, June 30, 2017		$	4,655			$	4,152			$	12,735

¹  Recurring transfers to Level 3 from Level 2 consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards.

		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Residential mortgage loans held for sale
Balance, December 31, 2016		$	5,789			$	4,152			$	11,617
Transfer to Level 3 from Level 21		—				—				2,740
Purchases		—				—				—
Proceeds from sales		—				—				(1,702		)
Redemptions and distributions		(1,100		)		—				—
Gain (loss) recognized in earnings
Mortgage banking revenue		—				—				80
Other comprehensive income (loss):
Net change in unrealized gain (loss)		(34		)		—				—
Balance, June 30, 2017		$	4,655			$	4,152			$	12,735

¹  Recurring transfers to Level 3 from Level 2 consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards.

Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block]

A summary of quantitative information about assets measured at fair value on a recurring basis using Significant Unobservable Inputs (Level 3) as of June 30, 2018 follows (in thousands):

		Par Value				Amortized Cost/Unpaid Principal Balance				Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
Available for sale securities
Municipal and other tax-exempt securities		$	2,050			$	2,033			$	2,030			Discounted cash flows	1	Interest rate spread		6.69%-6.69% (6.69%)	2
																		99.00%-99.00% (99.00%)	3
Other debt securities		500				500				471				Discounted cash flows	1	Interest rate spread		6.32%-6.32% (6.32%)	4
																		94.36% - 94.36 (94.36%)	3
Residential mortgage loans held for sale		N/A				15,025				14,252				Quoted prices of loans sold in securitization transactions, with a liquidity discount applied		Liquidity discount applied to the market value of mortgage loans qualifying for sale to U.S. government agencies.		94.86%

¹  Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume.

²  Interest rate yields used to value investment grade tax-exempt securities represent a spread of 413 basis points over average yields for comparable tax-exempt securities.

³  Represents fair value as a percentage of par value.

⁴  Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 3 percent.

A summary of quantitative information about Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2017 follows (in thousands):

		Par Value				Amortized Cost/Unpaid Principal Balance				Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
Available for sale securities
Municipal and other tax-exempt securities		$	5,095			$	5,068			$	4,802			Discounted cash flows	1	Interest rate spread		6.60%-6.60% (6.60%)	2
																		92.25%-94.76% (93.75%)	3
Other debt securities		500				500				472				Discounted cash flows	1	Interest rate spread		6.85%-6.85% (6.85%)	4
																		94.39% - 94.39 (94.39%)	3
Residential mortgage loans held for sale		N/A				12,981				12,299				Quoted prices of loans sold in securitization transactions, with a liquidity discount applied		Liquidity discount applied to the market value of mortgage loans qualifying for sale to U.S. government agencies.		94.75%

¹  Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume.

²  Interest rate yields used to value investment grade tax-exempt securities represent a spread of 372 to 466 basis points over average yields for comparable tax-exempt securities.

³  Represents fair value as a percentage of par value.

⁴  Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 3 percent.

A summary of quantitative information about Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2017 follows (in thousands):

		Par Value				Amortized Cost				Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
Available for sale securities
Municipal and other tax-exempt securities		$	5,095			$	5,067			$	4,655			Discounted cash flows	1	Interest rate spread		5.98%-5.98% (5.98%)	2
																		90.00%-94.90% (92.93%)	3
Other debt securities		4,400				4,400				4,152				Discounted cash flows	1	Interest rate spread		5.41%-6.72% (6.57%)	4
																		94.31% - 94.38 (94.37%)	3
Residential mortgage loans held for sale		N/A				13,274				12,735				Quoted prices of loans sold in securitization transactions, with a liquidity discount applied		Liquidity discount applied to the market value of a mortgage loans qualifying for sale to U.S. government agencies.		95.94%

¹  Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume.

²  Interest rate yields used to value investment grade tax-exempt securities represent a spread of 360 to 446 basis points over average yields for comparable tax-exempt securities.

³  Represents fair value as a percentage of par value.

⁴  Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 3 percent.

Fair Value Assets Measured on Nonrecurring Basis [Table Text Block]

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at June 30, 2018 for which the fair value was adjusted during the six months ended June 30, 2018:

													Fair Value Adjustments for the
	Carrying Value at June 30, 2018												Three Months Ended June 30, 2018 Recognized in:								Six Months Ended June 30, 2018 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs				Significant Unobservable Inputs				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
Impaired loans	$	—			$	1,045			$	11,763			$	6,701			$	—			$	7,198			$	—
Real estate and other repossessed assets	—				1,996				6,838				—				118				—				5,242

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at June 30, 2017 for which the fair value was adjusted during the six months ended June 30, 2017:

													Fair Value Adjustments for the
	Carrying Value at June 30, 2017												Three Months Ended June 30, 2017 Recognized in:								Six Months Ended June 30, 2017 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs				Significant Unobservable Inputs				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
Impaired loans	$	—			$	464			$	3,570			$	232			$	—			$	676			$	—
Real estate and other repossessed assets	—				3,488				530				—				772				—				906

Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2018 follows (in thousands):

		Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
Impaired loans		$	11,763			Discounted cash flows		Management knowledge of industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs		43% - 84% (53%)1
Real estate and other repossessed assets		6,838				Discounted cash flows		Recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs		N/A

¹  Represents fair value as a percentage of the unpaid principal balance.

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2017 follows (in thousands):

		Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
Impaired loans		$	3,570			Discounted cash flows		Recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs		75% - 90% (83%)1
Real estate and other repossessed assets		530				Appraised value, as adjusted		Marketability adjustments off appraised value2		65% - 88% (80%)

¹   Represents fair value as a percentage of the unpaid principal balance.

²   Marketability adjustments include consideration of estimated costs to sell which is approximately 10% of the fair value.

Fair Value of Financial Instruments [Table Text Block]

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis as of June 30, 2018 (dollars in thousands):

		Carrying Value				Estimated Fair Value				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Cash and due from banks		$	585,801			$	585,801			$	585,801			$	—			$	—
Interest-bearing cash and cash equivalents		872,999				872,999				872,999				—				—
Trading securities:
U.S. government agency debentures		28,750				28,750				—				28,750				—
U.S. government agency residential mortgage-backed securities		1,605,001				1,605,001				—				1,605,001				—
Municipal and other tax-exempt securities		70,606				70,606				—				70,606				—
Asset-backed securities		193,271				193,271				—				193,271				—
Other trading securities		11,987				11,987				—				11,987				—
Total trading securities		1,909,615				1,909,615				—				1,909,615				—
Investment securities:
Municipal and other tax-exempt securities		173,097				174,205				—				174,205				—
U.S. government agency residential mortgage-backed securities		13,989				13,984				—				13,984				—
Other debt securities		204,927				215,195				—				215,195				—
Total investment securities		392,013				403,384				—				403,384				—
Available for sale securities:
U.S. Treasury		490				490				490				—				—
Municipal and other tax-exempt securities		10,697				10,697				—				8,667				2,030
U.S. government agency residential mortgage-backed securities		5,304,560				5,304,560				—				5,304,560				—
Privately issued residential mortgage-backed securities		83,224				83,224				—				83,224				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,738,451				2,738,451				—				2,738,451				—
Other debt securities		25,444				25,444				—				24,973				471
Total available for sale securities		8,162,866				8,162,866				490				8,159,875				2,501
Fair value option securities – U.S. government agency residential mortgage-backed securities		482,227				482,227				—				482,227				—
Residential mortgage loans held for sale		223,301				223,301				—				209,058				14,243
Loans:
Commercial		11,349,039				11,116,828				—				—				11,116,828
Commercial real estate		3,712,220				3,639,121				—				—				3,639,121
Residential mortgage		1,942,250				1,917,099				—				—				1,917,099
Personal		1,000,187				990,419				—				—				990,419
Total loans		18,003,696				17,663,467				—				—				17,663,467
Allowance for loan losses		(215,142		)		—				—				—				—
Loans, net of allowance		17,788,554				17,663,467				—				—				17,663,467
Mortgage servicing rights		278,719				278,719				—				—				278,719
Derivative instruments with positive fair value, net of cash collateral		373,373				373,373				21,056				352,317				—
Deposits with no stated maturity		20,041,532				20,041,532				—				—				20,041,532
Time deposits		2,127,732				2,078,486				—				—				2,078,486
Other borrowed funds		6,809,472				6,571,762				—				—				6,571,762
Subordinated debentures		144,697				148,112				—				148,112				—
Derivative instruments with negative fair value, net of cash collateral		234,856				234,856				17,214				217,642				—

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis as of December 31, 2017 (dollars in thousands):

		Carrying Value				Estimated Fair Value				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Cash and due from banks		$	602,510			$	602,510			$	602,510			$	—			$	—
Interest-bearing cash and cash equivalents		1,714,544				1,714,544				1,714,544				—				—
Trading securities:
U.S. government agency debentures		21,196				21,196				—				21,196				—
U.S. government agency residential mortgage-backed securities		392,673				392,673				—				392,673				—
Municipal and other tax-exempt securities		13,559				13,559				—				13,559				—
Asset-backed securities		23,885				23,885				—				23,885				—
Other trading securities		11,363				11,363				—				11,363				—
Total trading securities		462,676				462,676				—				462,676				—
Investment securities:
Municipal and other tax-exempt securities		228,186				230,349				—				230,349				—
U.S. government agency residential mortgage-backed securities		15,891				16,242				—				16,242				—
Other debt securities		217,716				233,444				—				233,444				—
Total investment securities		461,793				480,035				—				480,035				—
Available for sale securities:
U.S. Treasury		1,000				1,000				1,000				—				—
Municipal and other tax-exempt securities		27,080				27,080				—				22,278				4,802
U.S. government agency residential mortgage-backed securities		5,309,152				5,309,152				—				5,309,152				—
Privately issued residential mortgage-backed securities		93,221				93,221				—				93,221				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,834,961				2,834,961				—				2,834,961				—
Other debt securities		25,481				25,481				—				25,009				472
Perpetual preferred stock		15,767				15,767				—				15,767				—
Equity securities and mutual funds		14,916				14,916				—				14,916				—
Total available for sale securities		8,321,578				8,321,578				1,000				8,315,304				5,274
Fair value option securities – U.S. government agency residential mortgage-backed securities		755,054				755,054				—				755,054				—
Residential mortgage loans held for sale		221,378				221,378				—				209,079				12,299
Loans:
Commercial		10,733,975				10,524,627				—				—				10,524,627
Commercial real estate		3,479,987				3,428,733				—				—				3,428,733
Residential mortgage		1,973,686				1,977,721				—				—				1,977,721
Personal		965,776				956,706				—				—				956,706
Total loans		17,153,424				16,887,787				—				—				16,887,787
Allowance for loan losses		(230,682		)		—				—				—				—
Loans, net of allowance		16,922,742				16,887,787				—				—				16,887,787
Mortgage servicing rights		252,867				252,867				—				—				252,867
Derivative instruments with positive fair value, net of cash collateral		220,502				220,502				8,179				212,323				—
Deposits with no stated maturity		19,962,889				19,962,889				—				—				19,962,889
Time deposits		2,098,416				2,064,558				—				—				2,064,558
Other borrowed funds		5,709,861				5,703,121				—				—				5,703,121
Subordinated debentures		144,677				148,207				—				148,207				—
Derivative instruments with negative fair value, net of cash collateral		171,963				171,963				—				171,963				—

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis as of June 30, 2017 (dollars in thousands):

		Carrying Value				Estimated Fair Value				Quoted Prices in Active Markets for Identical Instruments (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Cash and due from banks		$	561,587			$	561,587			$	561,587			$	—			$	—
Interest-bearing cash and cash equivalents		2,078,831				2,078,831				2,078,831				—				—
Trading securities:
U.S. government agency debentures		20,954				20,954				—				20,954				—
U.S. government agency residential mortgage-backed securities		365,171				365,171				—				365,171				—
Municipal and other tax-exempt securities		45,444				45,444				—				45,444				—
Other trading securities		9,845				9,845				—				9,845				—
Total trading securities		441,414				441,414				—				441,414				—
Investment securities:
Municipal and other tax-exempt securities		267,375				270,531				—				270,531				—
U.S. government agency residential mortgage-backed securities		18,035				18,642				—				18,642				—
Other debt securities		205,016				226,502				—				226,502				—
Total investment securities		490,426				515,675				—				515,675				—
Available for sale securities:
U.S. Treasury		998				998				998				—				—
Municipal and other tax-exempt securities		32,765				32,765				—				28,110				4,655
U.S. government agency residential mortgage-backed securities		5,382,377				5,382,377				—				5,382,377				—
Privately issued residential mortgage-backed securities		103,383				103,383				—				103,383				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,782,070				2,782,070				—				2,782,070				—
Other debt securities		4,152				4,152				—				—				4,152
Perpetual preferred stock		16,568				16,568				—				16,568				—
Equity securities and mutual funds		18,728				18,728				3,516				15,212				—
Total available for sale securities		8,341,041				8,341,041				4,514				8,327,720				8,807
Fair value option securities – U.S. government agency residential mortgage-backed securities		445,169				445,169				—				445,169				—
Residential mortgage loans held for sale		287,259				287,259				—				274,524				12,735
Loans:
Commercial		10,637,955				10,413,704				—				—				10,413,704
Commercial real estate		3,688,592				3,636,365				—				—				3,636,365
Residential mortgage		1,939,198				1,950,577				—				—				1,950,577
Personal		917,900				909,055				—				—				909,055
Total loans		17,183,645				16,909,701				—				—				16,909,701
Allowance for loan losses		(250,061		)		—				—				—				—
Loans, net of allowance		16,933,584				16,909,701				—				—				16,909,701
Mortgage servicing rights		245,239				245,239				—				—				245,239
Derivative instruments with positive fair value, net of cash collateral		280,289				280,289				46,366				233,923				—
Deposits with no stated maturity		20,120,352				20,120,352				—				—				20,120,352
Time deposits		2,196,122				2,164,115				—				—				2,164,115
Other borrowed funds		5,696,666				5,664,273				—				—				5,664,273
Subordinated debentures		144,658				147,204				—				147,204				—
Derivative instruments with negative fair value, net of cash collateral		285,819				285,819				20,915				264,904				—

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