Loans (Tables)

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

Loan composition

The period end loan composition was as follows.

	September 30, 2017		December 31, 2016
	($ in Thousands)
Commercial and industrial	$	6,534,660	$	6,489,014
Commercial real estate — owner occupied	827,064		897,724
Commercial and business lending	7,361,724		7,386,738
Commercial real estate — investor	3,345,536		3,574,732
Real estate construction	1,552,135		1,432,497
Commercial real estate lending	4,897,671		5,007,229
Total commercial	12,259,395		12,393,967
Residential mortgage	7,408,471		6,332,327
Home equity	890,130		934,443
Other consumer	373,464		393,979
Total consumer	8,672,065		7,660,749
Total loans	$	20,931,460	$	20,054,716

Commercial and consumer loans by credit quality indicator

The following table presents commercial and consumer loans by credit quality indicator at September 30, 2017.

	Pass		Special Mention		Potential Problem		Nonaccrual		Total
	($ in Thousands)
Commercial and industrial	$	6,101,491	$	157,106	$	153,779	$	122,284	$	6,534,660
Commercial real estate - owner occupied	742,257		11,741		57,468		15,598		827,064
Commercial and business lending	6,843,748		168,847		211,247		137,882		7,361,724
Commercial real estate - investor	3,284,497		10,726		46,770		3,543		3,345,536
Real estate construction	1,550,462		15		118		1,540		1,552,135
Commercial real estate lending	4,834,959		10,741		46,888		5,083		4,897,671
Total commercial	11,678,707		179,588		258,135		142,965		12,259,395
Residential mortgage	7,352,286		881		650		54,654		7,408,471
Home equity	876,003		1,364		124		12,639		890,130
Other consumer	372,638		567		—		259		373,464
Total consumer	8,600,927		2,812		774		67,552		8,672,065
Total	$	20,279,634	$	182,400	$	258,909	$	210,517	$	20,931,460

The following table presents commercial and consumer loans by credit quality indicator at December 31, 2016.

	Pass		Special Mention		Potential Problem		Nonaccrual		Total
	($ in Thousands)
Commercial and industrial	$	5,937,119	$	141,328	$	227,196	$	183,371	$	6,489,014
Commercial real estate - owner occupied	805,871		17,785		64,524		9,544		897,724
Commercial and business lending	6,742,990		159,113		291,720		192,915		7,386,738
Commercial real estate - investor	3,491,217		14,236		51,228		18,051		3,574,732
Real estate construction	1,429,083		105		2,465		844		1,432,497
Commercial real estate lending	4,920,300		14,341		53,693		18,895		5,007,229
Total commercial	11,663,290		173,454		345,413		211,810		12,393,967
Residential mortgage	6,275,162		1,314		5,615		50,236		6,332,327
Home equity	919,740		1,588		114		13,001		934,443
Other consumer	393,161		562		—		256		393,979
Total consumer	7,588,063		3,464		5,729		63,493		7,660,749
Total	$	19,251,353	$	176,918	$	351,142	$	275,303	$	20,054,716

Summarized details of Loans

The following table presents loans by past due status at September 30, 2017.

	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due(a)		Nonaccrual(b)		Total
	($ in Thousands)
Commercial and industrial	$	6,410,690	$	1,254	$	124	$	308	$	122,284	$	6,534,660
Commercial real estate - owner occupied	809,944		1,522		—		—		15,598		827,064
Commercial and business lending	7,220,634		2,776		124		308		137,882		7,361,724
Commercial real estate - investor	3,340,884		1,109		—		—		3,543		3,345,536
Real estate construction	1,549,895		685		15		—		1,540		1,552,135
Commercial real estate lending	4,890,779		1,794		15		—		5,083		4,897,671
Total commercial	12,111,413		4,570		139		308		142,965		12,259,395
Residential mortgage	7,344,947		8,327		543		—		54,654		7,408,471
Home equity	870,300		5,852		1,339		—		12,639		890,130
Other consumer	370,216		987		699		1,303		259		373,464
Total consumer	8,585,463		15,166		2,581		1,303		67,552		8,672,065
Total	$	20,696,876	$	19,736	$	2,720	$	1,611	$	210,517	$	20,931,460

(a) The recorded investment in loans past due 90 days or more and still accruing totaled $2 million at September 30, 2017 (the same as the reported balances for the accruing loans noted above).

(b) Of the total nonaccrual loans, $156 million or 74% were current with respect to payment at September 30, 2017.

The following table presents loans by past due status at December 31, 2016.

	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due(a)		Nonaccrual(b)		Total
	($ in Thousands)
Commercial and industrial	$	6,303,994	$	965	$	448	$	236	$	183,371	$	6,489,014
Commercial real estate - owner occupied	886,796		968		416		—		9,544		897,724
Commercial and business lending	7,190,790		1,933		864		236		192,915		7,386,738
Commercial real estate - investor	3,555,750		431		500		—		18,051		3,574,732
Real estate construction	1,431,284		264		105		—		844		1,432,497
Commercial real estate lending	4,987,034		695		605		—		18,895		5,007,229
Total commercial	12,177,824		2,628		1,469		236		211,810		12,393,967
Residential mortgage	6,273,949		7,298		844		—		50,236		6,332,327
Home equity	915,593		4,265		1,584		—		13,001		934,443
Other consumer	389,157		2,471		718		1,377		256		393,979
Total consumer	7,578,699		14,034		3,146		1,377		63,493		7,660,749
Total	$	19,756,523	$	16,662	$	4,615	$	1,613	$	275,303	$	20,054,716

(a) The recorded investment in loans past due 90 days or more and still accruing totaled $2 million at December 31, 2016 (the same as the reported balances for the accruing loans noted above).

(b)

Of the total nonaccrual loans, $224 million or 81% were current with respect to payment at December 31, 2016.

Summarized details of impaired Loans

The following table presents impaired loans individually evaluated under ASC Topic 310 at September 30, 2017.

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	($ in Thousands)
Loans with a related allowance
Commercial and industrial	$	67,226	$	72,343	$	11,540	$	76,082	$	1,050
Commercial real estate — owner occupied	12,255		12,374		1,549		12,032		192
Commercial and business lending	79,481		84,717		13,089		88,114		1,242
Commercial real estate — investor	16,974		16,988		1,812		16,992		1,224
Real estate construction	476		586		75		489		22
Commercial real estate lending	17,450		17,574		1,887		17,481		1,246
Total commercial	96,931		102,291		14,976		105,595		2,488
Residential mortgage	42,684		45,028		6,893		43,090		1,258
Home equity	10,351		11,283		3,684		10,537		411
Other consumer	1,092		1,093		118		1,095		1
Total consumer	54,127		57,404		10,695		54,722		1,670
Total loans(a)	$	151,058	$	159,695	$	25,671	$	160,317	$	4,158
Loans with no related allowance
Commercial and industrial	$	86,802	$	99,480	$	—	$	100,398	$	927
Commercial real estate — owner occupied	6,871		7,716		—		7,016		—
Commercial and business lending	93,673		107,196		—		107,414		927
Commercial real estate — investor	589		732		—		606		—
Real estate construction	213		218		—		220		—
Commercial real estate lending	802		950		—		826		—
Total commercial	94,475		108,146		—		108,240		927
Residential mortgage	6,469		7,074		—		6,492		105
Home equity	540		543		—		540		—
Other consumer	—		—		—		—		—
Total consumer	7,009		7,617		—		7,032		105
Total loans(a)	$	101,484	$	115,763	$	—	$	115,272	$	1,032
Total
Commercial and industrial	$	154,028	$	171,823	$	11,540	$	176,480	$	1,977
Commercial real estate — owner occupied	19,126		20,090		1,549		19,048		192
Commercial and business lending	173,154		191,913		13,089		195,528		2,169
Commercial real estate — investor	17,563		17,720		1,812		17,598		1,224
Real estate construction	689		804		75		709		22
Commercial real estate lending	18,252		18,524		1,887		18,307		1,246
Total commercial	191,406		210,437		14,976		213,835		3,415
Residential mortgage	49,153		52,102		6,893		49,582		1,363
Home equity	10,891		11,826		3,684		11,077		411
Other consumer	1,092		1,093		118		1,095		1
Total consumer	61,136		65,021		10,695		61,754		1,775
Total loans(a)	$	252,542	$	275,458	$	25,671	$	275,589	$	5,190

(a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 82% of the unpaid principal balance at September 30, 2017.

The following table presents impaired loans individually evaluated under ASC Topic 310 at December 31, 2016. 

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	($ in Thousands)
Loans with a related allowance
Commercial and industrial	$	99,786	$	105,175	$	21,047	$	104,808	$	2,345
Commercial real estate — owner occupied	5,544		5,568		23		5,840		263
Commercial and business lending	105,330		110,743		21,070		110,648		2,608
Commercial real estate — investor	26,764		27,031		3,410		30,665		2,120
Real estate construction	509		648		84		529		31
Commercial real estate lending	27,273		27,679		3,494		31,194		2,151
Total commercial	132,603		138,422		24,564		141,842		4,759
Residential mortgage	37,902		39,979		6,438		38,608		1,551
Home equity	11,070		11,909		3,943		11,420		627
Other consumer	1,012		1,023		109		1,021		2
Total consumer	49,984		52,911		10,490		51,049		2,180
Total loans(a)	$	182,587	$	191,333	$	35,054	$	192,891	$	6,939
Loans with no related allowance
Commercial and industrial	$	113,485	$	134,863	$	—	$	117,980	$	1,519
Commercial real estate — owner occupied	8,439		9,266		—		8,759		138
Commercial and business lending	121,924		144,129		—		126,739		1,657
Commercial real estate — investor	6,144		6,478		—		7,092		—
Real estate construction	—		—		—		—		—
Commercial real estate lending	6,144		6,478		—		7,092		—
Total commercial	128,068		150,607		—		133,831		1,657
Residential mortgage	5,974		6,998		—		6,610		184
Home equity	106		107		—		107		4
Other consumer	—		—		—		—		—
Total consumer	6,080		7,105		—		6,717		188
Total loans(a)	$	134,148	$	157,712	$	—	$	140,548	$	1,845
Total
Commercial and industrial	$	213,271	$	240,038	$	21,047	$	222,788	$	3,864
Commercial real estate — owner occupied	13,983		14,834		23		14,599		401
Commercial and business lending	227,254		254,872		21,070		237,387		4,265
Commercial real estate — investor	32,908		33,509		3,410		37,757		2,120
Real estate construction	509		648		84		529		31
Commercial real estate lending	33,417		34,157		3,494		38,286		2,151
Total commercial	260,671		289,029		24,564		275,673		6,416
Residential mortgage	43,876		46,977		6,438		45,218		1,735
Home equity	11,176		12,016		3,943		11,527		631
Other consumer	1,012		1,023		109		1,021		2
Total consumer	56,064		60,016		10,490		57,766		2,368
Total loans(a)	$	316,735	$	349,045	$	35,054	$	333,439	$	8,784

(a)

The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 81% of the unpaid principal balance at December 31, 2016.

Nonaccrual and performing restructured loans

The following table presents nonaccrual and performing restructured loans by loan portfolio.

	September 30, 2017				December 31, 2016
	Performing Restructured Loans		Nonaccrual Restructured Loans(a)		Performing Restructured Loans		Nonaccrual Restructured Loans(a)
	($ in Thousands)
Commercial and industrial	$	32,572	$	7,994	$	31,884	$	1,276
Commercial real estate — owner occupied	4,077		2,145		5,490		2,220
Commercial real estate — investor	14,294		589		15,289		924
Real estate construction	316		160		359		150
Residential mortgage	16,859		20,248		18,100		21,906
Home equity	7,987		2,364		7,756		2,877
Other consumer	1,073		20		979		32
Total	$	77,178	$	33,520	$	79,857	$	29,385

(a)

Nonaccrual restructured loans have been included within nonaccrual loans.

Summary of restructured loans

The following table provides the number of loans modified in a troubled debt restructuring by loan portfolio during the nine months ended September 30, 2017 and 2016, respectively, and the recorded investment and unpaid principal balance as of September 30, 2017 and 2016, respectively.

	Nine Months Ended September 30, 2017					Nine Months Ended September 30, 2016
	Number of Loans	Recorded Investment(a)		Unpaid Principal Balance(b)		Number of Loans	Recorded Investment(a)		Unpaid Principal Balance(b)
	($ in Thousands)
Commercial and industrial	19	$	11,387	$	15,898	10	$	2,455	$	2,517
Commercial real estate — owner occupied	2	710		710		1	117		124
Real estate construction	—	—		—		1	66		91
Residential mortgage	48	4,445		4,638		56	4,676		4,922
Home equity	35	934		1,182		47	1,709		1,793
Other consumer	—	—		—		1	15		16
Total	104	$	17,476	$	22,428	116	$	9,038	$	9,463

(a) Represents post-modification outstanding recorded investment.

(b)

Represents pre-modification outstanding recorded investment.

Troubled debt restructurings subsequent redefault

The following table provides the number of loans modified in a troubled debt restructuring during the previous twelve months which subsequently defaulted during the nine months ended September 30, 2017 and 2016, respectively, as well as the recorded investment in these restructured loans as of September 30, 2017 and 2016, respectively.

	Nine Months Ended September 30, 2017			Nine Months Ended September 30, 2016
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	($ in Thousands)
Commercial and industrial	1	$	1	—	$	—
Residential mortgage	21	1,335		36	3,310
Home equity	14	371		12	182
Other consumer	—	—		1	15
Total	36	$	1,707	49	$	3,507

Changes in the allowance for loan losses by portfolio segment

($ in Millions)	Nine Months Ended September 30, 2017			Year Ended December 31, 2016
Balance at beginning of period	$	38		$	42
Charge offs	(26		)	(59		)
Recoveries	—			—
Net Charge offs	(26		)	(59		)
Provision for loan losses	18			55
Balance at end of period	$	30		$	38
Allowance for loan losses
Individually evaluated for impairment	$	2		$	14
Collectively evaluated for impairment	28			24
Total allowance for loan losses	$	30		$	38
Loans
Individually evaluated for impairment	$	92		$	147
Collectively evaluated for impairment	485			521
Total loans	$	577		$	668

The following table presents a summary of the changes in the allowance for loan losses by portfolio segment for the nine months ended September 30, 2017.

($ in Thousands)	Commercial and industrial			Commercial real estate - owner occupied			Commercial real estate -  investor			Real estate construction			Residential mortgage			Home equity			Other consumer			Total
December 31, 2016	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Charge offs	(33,928		)	(83		)	(803		)	(225		)	(1,472		)	(2,208		)	(3,238		)	(41,957		)
Recoveries	9,072			158			218			60			754			2,348			563			13,173
Net Charge offs	(24,856		)	75			(585		)	(165		)	(718		)	140			(2,675		)	(28,784		)
Provision for loan losses	23,587			(4,352		)	1,798			(1,340		)	4,632			(479		)	3,154			27,000
September 30, 2017	$	138,857		$	9,757		$	46,498		$	25,427		$	30,960		$	20,025		$	5,027		$	276,551
Allowance for loan losses
Individually evaluated for impairment	$	11,540		$	1,549		$	1,812		$	75		$	6,893		$	3,684		$	118		$	25,671
Collectively evaluated for impairment	127,317			8,208			44,686			25,352			24,067			16,341			4,909			250,880
Total allowance for loan losses	$	138,857		$	9,757		$	46,498		$	25,427		$	30,960		$	20,025		$	5,027		$	276,551
Loans
Individually evaluated for impairment	$	154,028		$	19,126		$	17,563		$	689		$	49,153		$	10,891		$	1,092		$	252,542
Collectively evaluated for impairment	6,380,632			807,938			3,327,973			1,551,446			7,359,318			879,239			372,372			20,678,918
Total loans	$	6,534,660		$	827,064		$	3,345,536		$	1,552,135		$	7,408,471		$	890,130		$	373,464		$	20,931,460

For comparison purposes, a summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2016, was as follows.

($ in Thousands)	Commercial and industrial			Commercial real estate - owner occupied			Commercial real estate -  investor			Real estate construction			Residential mortgage			Home equity			Other consumer			Total
December 31, 2015	$	129,959		$	18,680		$	43,018		$	25,266		$	28,261		$	23,555		$	5,525		$	274,264
Charge offs	(71,016		)	(512		)	(1,504		)	(558		)	(4,332		)	(4,686		)	(3,831		)	(86,439		)
Recoveries	14,543			74			1,624			203			755			3,491			820			21,510
Net Charge offs	(56,473		)	(438		)	120			(355		)	(3,577		)	(1,195		)	(3,011		)	(64,929		)
Provision for loan losses	66,640			(4,208		)	2,147			2,021			2,362			(1,996		)	2,034			69,000
December 31, 2016	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Allowance for loan losses
Individually evaluated for impairment	$	21,047		$	23		$	3,410		$	84		$	6,438		$	3,943		$	109		$	35,054
Collectively evaluated for impairment	119,079			14,011			41,875			26,848			20,608			16,421			4,439			243,281
Total allowance for loan losses	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Loans
Individually evaluated for impairment	$	213,271		$	13,983		$	32,908		$	509		$	43,876		$	11,176		$	1,012		$	316,735
Collectively evaluated for impairment	6,275,743			883,741			3,541,824			1,431,988			6,288,451			923,267			392,967			19,737,981
Total loans	$	6,489,014		$	897,724		$	3,574,732		$	1,432,497		$	6,332,327		$	934,443		$	393,979		$	20,054,716

Changes in the allowance for loan losses by oil and gas segment

($ in Millions)	Nine Months Ended September 30, 2017			Year Ended December 31, 2016
Balance at beginning of period	$	38		$	42
Charge offs	(26		)	(59		)
Recoveries	—			—
Net Charge offs	(26		)	(59		)
Provision for loan losses	18			55
Balance at end of period	$	30		$	38
Allowance for loan losses
Individually evaluated for impairment	$	2		$	14
Collectively evaluated for impairment	28			24
Total allowance for loan losses	$	30		$	38
Loans
Individually evaluated for impairment	$	92		$	147
Collectively evaluated for impairment	485			521
Total loans	$	577		$	668

The following table presents a summary of the changes in the allowance for loan losses by portfolio segment for the nine months ended September 30, 2017.

($ in Thousands)	Commercial and industrial			Commercial real estate - owner occupied			Commercial real estate -  investor			Real estate construction			Residential mortgage			Home equity			Other consumer			Total
December 31, 2016	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Charge offs	(33,928		)	(83		)	(803		)	(225		)	(1,472		)	(2,208		)	(3,238		)	(41,957		)
Recoveries	9,072			158			218			60			754			2,348			563			13,173
Net Charge offs	(24,856		)	75			(585		)	(165		)	(718		)	140			(2,675		)	(28,784		)
Provision for loan losses	23,587			(4,352		)	1,798			(1,340		)	4,632			(479		)	3,154			27,000
September 30, 2017	$	138,857		$	9,757		$	46,498		$	25,427		$	30,960		$	20,025		$	5,027		$	276,551
Allowance for loan losses
Individually evaluated for impairment	$	11,540		$	1,549		$	1,812		$	75		$	6,893		$	3,684		$	118		$	25,671
Collectively evaluated for impairment	127,317			8,208			44,686			25,352			24,067			16,341			4,909			250,880
Total allowance for loan losses	$	138,857		$	9,757		$	46,498		$	25,427		$	30,960		$	20,025		$	5,027		$	276,551
Loans
Individually evaluated for impairment	$	154,028		$	19,126		$	17,563		$	689		$	49,153		$	10,891		$	1,092		$	252,542
Collectively evaluated for impairment	6,380,632			807,938			3,327,973			1,551,446			7,359,318			879,239			372,372			20,678,918
Total loans	$	6,534,660		$	827,064		$	3,345,536		$	1,552,135		$	7,408,471		$	890,130		$	373,464		$	20,931,460

For comparison purposes, a summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2016, was as follows.

($ in Thousands)	Commercial and industrial			Commercial real estate - owner occupied			Commercial real estate -  investor			Real estate construction			Residential mortgage			Home equity			Other consumer			Total
December 31, 2015	$	129,959		$	18,680		$	43,018		$	25,266		$	28,261		$	23,555		$	5,525		$	274,264
Charge offs	(71,016		)	(512		)	(1,504		)	(558		)	(4,332		)	(4,686		)	(3,831		)	(86,439		)
Recoveries	14,543			74			1,624			203			755			3,491			820			21,510
Net Charge offs	(56,473		)	(438		)	120			(355		)	(3,577		)	(1,195		)	(3,011		)	(64,929		)
Provision for loan losses	66,640			(4,208		)	2,147			2,021			2,362			(1,996		)	2,034			69,000
December 31, 2016	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Allowance for loan losses
Individually evaluated for impairment	$	21,047		$	23		$	3,410		$	84		$	6,438		$	3,943		$	109		$	35,054
Collectively evaluated for impairment	119,079			14,011			41,875			26,848			20,608			16,421			4,439			243,281
Total allowance for loan losses	$	140,126		$	14,034		$	45,285		$	26,932		$	27,046		$	20,364		$	4,548		$	278,335
Loans
Individually evaluated for impairment	$	213,271		$	13,983		$	32,908		$	509		$	43,876		$	11,176		$	1,012		$	316,735
Collectively evaluated for impairment	6,275,743			883,741			3,541,824			1,431,988			6,288,451			923,267			392,967			19,737,981
Total loans	$	6,489,014		$	897,724		$	3,574,732		$	1,432,497		$	6,332,327		$	934,443		$	393,979		$	20,054,716

Changes in the allowance for unfunded commitments

The following table presents a summary of the changes in the allowance for unfunded commitments.

	Nine Months Ended September 30, 2017			Year Ended December 31, 2016
	($ in Thousands)
Allowance for Unfunded Commitments
Balance at beginning of period	$	25,400		$	24,400
Provision for unfunded commitments	(1,000		)	1,000
Balance at end of period	$	24,400		$	25,400