Loans

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Loans

NOTE 4 LOANS:

During 2015, the Corporation reclassified all closed end first lien home equity loans to residential mortgage loans in order to better align with the Corporation's regulatory reporting of residential mortgage loan products. All prior periods have been restated to reflect this change. As a result, the restated home equity loan portfolio is $1.1 billion for December 31, 2014, compared to the originally reported amount of $1.6 billion. Similarly, the restated residential mortgage loan portfolio is $5.1 billion for December 31, 2014, compared to the originally reported amount of $4.5 billion.

Loans at December 31 are summarized below.

	2015		2014
	($ in Thousands)
Commercial and industrial	$	6,147,440	$	5,905,902
Commercial real estate — owner occupied	918,212		1,007,937
Lease financing	43,243		51,529
Commercial and business lending	7,108,895		6,965,368
Commercial real estate — investor	3,234,266		3,056,485
Real estate construction	1,162,145		1,008,956
Commercial real estate lending	4,396,411		4,065,441
Total commercial	11,505,306		11,030,809
Home equity	1,005,802		1,051,927
Installment and credit cards	419,968		454,219
Residential mortgage	5,783,267		5,056,891
Total consumer	7,209,037		6,563,037
Total loans	$	18,714,343	$	17,593,846

The Corporation has granted loans to their directors, executive officers, or their related interests. These loans were made on substantially the same terms, including rates and collateral, as those prevailing at the time for comparable transactions with other unrelated customers, and do not involve more than a normal risk of collection. These loans to related parties are summarized below.

	2015
	($ in Thousands)
Balance at beginning of year	$	74,420
New loans	14,840
Repayments	(19,990		)
Changes due to status of executive officers and directors	(32,673		)
Balance at end of year	$	36,597

A summary of the changes in the allowance for credit losses for the years indicated was as follows.

	2015			2014			2013
	($ in Thousands)
Allowance for Loan Losses:
Balance at beginning of year	$	266,302		$	268,315		$	297,409
Provision for loan losses	38,000			13,000			10,000
Charge offs	(52,280		)	(44,096		)	(88,061		)
Recoveries	22,242			29,083			48,967
Net charge offs	(30,038		)	(15,013		)	(39,094		)
Balance at end of year	$	274,264		$	266,302		$	268,315
Allowance for Unfunded Commitments:
Balance at beginning of year	$	24,900		$	21,900		$	21,800
Provision for unfunded commitments	(500		)	3,000			100
Balance at end of year	$	24,400		$	24,900		$	21,900
Allowance for Credit Losses	$	298,664		$	291,202		$	290,215

The allowance for credit losses is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the allowance for loan losses represents management’s estimate of an amount appropriate to provide for probable credit losses in the loan portfolio at the balance sheet date. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit) and is included in accrued expenses and other liabilities on the consolidated balance sheets. See Note 1 for the Corporation’s accounting policy for the allowance for loan losses and the allowance for unfunded commitments. See Note 16 for additional information on the allowance for unfunded commitments.

A summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2015, was as follows.

$ in Thousands	Commercial and industrial			Commercial real estate — owner occupied			Lease financing			Commercial real estate — investor			Real estate construction			Home equity			Installment and credit cards			Residential mortgage			Total
Balance at Dec 31, 2014	$	116,025		$	16,510		$	1,610		$	46,333		$	20,999		$	26,464		$	6,435		$	31,926		$	266,302
Provision for loan losses	30,861			3,894			(671		)	(2,827		)	2,749			906			2,194			894			38,000
Charge offs	(27,687		)	(2,645		)	—			(4,645		)	(750		)	(7,048		)	(3,869		)	(5,636		)	(52,280		)
Recoveries	9,795			921			26			4,157			2,268			3,233			765			1,077			22,242
Balance at Dec 31, 2015	$	128,994		$	18,680		$	965		$	43,018		$	25,266		$	23,555		$	5,525		$	28,261		$	274,264
Allowance for loan losses:
Ending balance impaired loans individually evaluated for impairment	$	7,522		$	—		$	—		$	229		$	—		$	46		$	—		$	166		$	7,963
Ending balance impaired loans collectively evaluated for impairment	$	640		$	448		$	—		$	1,602		$	453		$	10,072		$	195		$	12,296		$	25,706
Total impaired loans	$	8,162		$	448		$	—		$	1,831		$	453		$	10,118		$	195		$	12,462		$	33,669
Ending balance all other loans collectively evaluated for impairment	$	120,832		$	18,232		$	965		$	41,187		$	24,813		$	13,437		$	5,330		$	15,799		$	240,595
Total	$	128,994		$	18,680		$	965		$	43,018		$	25,266		$	23,555		$	5,525		$	28,261		$	274,264
Loans:
Ending balance impaired loans individually evaluated for impairment	$	89,935		$	6,221		$	1,634		$	5,460		$	—		$	1,281		$	—		$	6,956		$	111,487
Ending balance impaired loans collectively evaluated for impairment	$	31,299		$	9,705		$	—		$	25,098		$	1,450		$	21,032		$	1,154		$	64,396		$	154,134
Total impaired loans	$	121,234		$	15,926		$	1,634		$	30,558		$	1,450		$	22,313		$	1,154		$	71,352		$	265,621
Ending balance all other loans collectively evaluated for impairment	$	6,026,206		$	902,286		$	41,609		$	3,203,708		$	1,160,695		$	983,489		$	418,814		$	5,711,915		$	18,448,722
Total	$	6,147,440		$	918,212		$	43,243		$	3,234,266		$	1,162,145		$	1,005,802		$	419,968		$	5,783,267		$	18,714,343

At December 31, 2015, $42 million of the commercial and industrial allowance for loan losses was attributable to Oil and Gas related credits, compared to $17 million at December 31, 2014. This allocated allowance for loan losses represented 5.58% and 2.26% of period end Oil and Gas related loans at December 31, 2015 and December 31, 2014, respectively. The total allowance for loan losses is available to absorb losses from any segment of the loan portfolio.

For comparison purposes, a summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2014, was as follows.

$ in Thousands	Commercial and industrial			Commercial real estate — owner occupied			Lease financing			Commercial real estate — investor			Real estate construction			Home equity			Installment and credit cards			Residential mortgage			Total
Balance at Dec 31, 2013	$	104,501		$	19,476		$	1,607		$	58,156		$	23,418		$	27,932		$	2,416		$	30,809		$	268,315
Provision for loan losses	14,767			(1,296		)	35			(17,290		)	(1,277		)	6,278			6,279			5,504			13,000
Charge offs	(14,633		)	(3,476		)	(39		)	(4,529		)	(1,958		)	(10,946		)	(2,876		)	(5,639		)	(44,096		)
Recoveries	11,390			1,806			7			9,996			816			3,200			616			1,252			29,083
Balance at Dec 31, 2014	$	116,025		$	16,510		$	1,610		$	46,333		$	20,999		$	26,464		$	6,435		$	31,926		$	266,302
Allowance for loan losses:
Ending balance impaired loans individually evaluated for impairment	$	13,615		$	1,490		$	574		$	1,649		$	328		$	11		$	—		$	199		$	17,866
Ending balance impaired loans collectively evaluated for impairment	$	2,852		$	1,731		$	—		$	1,938		$	767		$	11,371		$	308		$	13,598		$	32,565
Total impaired loans	$	16,467		$	3,221		$	574		$	3,587		$	1,095		$	11,382		$	308		$	13,797		$	50,431
Ending balance all other loans collectively evaluated for impairment	$	99,558		$	13,289		$	1,036		$	42,746		$	19,904		$	15,082		$	6,127		$	18,129		$	215,871
Total	$	116,025		$	16,510		$	1,610		$	46,333		$	20,999		$	26,464		$	6,435		$	31,926		$	266,302
Loans:
Ending balance impaired loans individually evaluated for impairment	$	45,118		$	20,731		$	1,801		$	19,683		$	3,776		$	962		$	—		$	9,751		$	101,822
Ending balance impaired loans collectively evaluated for impairment	$	38,437		$	15,548		$	—		$	26,129		$	2,350		$	23,698		$	1,587		$	66,058		$	173,807
Total impaired loans	$	83,555		$	36,279		$	1,801		$	45,812		$	6,126		$	24,660		$	1,587		$	75,809		$	275,629
Ending balance all other loans collectively evaluated for impairment	$	5,822,347		$	971,658		$	49,728		$	3,010,673		$	1,002,830		$	1,027,267		$	452,632		$	4,981,082		$	17,318,217
Total	$	5,905,902		$	1,007,937		$	51,529		$	3,056,485		$	1,008,956		$	1,051,927		$	454,219		$	5,056,891		$	17,593,846

The following table presents commercial loans by credit quality indicator at December 31, 2015.

	Pass		Special Mention		Potential Problem		Impaired		Total
	($ Thousands)
Commercial and industrial	$	5,455,573	$	339,953	$	230,680	$	121,234	$	6,147,440
Commercial real estate — owner occupied	827,694		38,886		35,706		15,926		918,212
Lease financing	37,969		1,190		2,450		1,634		43,243
Commercial and business lending	6,321,236		380,029		268,836		138,794		7,108,895
Commercial real estate — investor	3,150,134		27,630		25,944		30,558		3,234,266
Real estate construction	1,156,524		252		3,919		1,450		1,162,145
Commercial real estate lending	4,306,658		27,882		29,863		32,008		4,396,411
Total commercial	$	10,627,894	$	407,911	$	298,699	$	170,802	$	11,505,306

The following table presents commercial loans by credit quality indicator at December 31, 2014.

	Pass		Special Mention		Potential Problem		Impaired		Total
	($ Thousands)
Commercial and industrial	$	5,594,497	$	119,328	$	108,522	$	83,555	$	5,905,902
Commercial real estate — owner occupied	904,526		18,437		48,695		36,279		1,007,937
Lease financing	46,931		88		2,709		1,801		51,529
Commercial and business lending	6,545,954		137,853		159,926		121,635		6,965,368
Commercial real estate — investor	2,974,493		12,137		24,043		45,812		3,056,485
Real estate construction	998,972		2,082		1,776		6,126		1,008,956
Commercial real estate lending	3,973,465		14,219		25,819		51,938		4,065,441
Total commercial	$	10,519,419	$	152,072	$	185,745	$	173,573	$	11,030,809

The following table presents consumer loans by credit quality indicator at December 31, 2015.

	Performing		30-89 Days Past Due		Potential Problem		Impaired		Total
	($ Thousands)
Home equity	$	975,348	$	7,919	$	222	$	22,313	$	1,005,802
Installment and credit cards	416,944		1,870		—		1,154		419,968
Residential mortgage	5,704,189		4,930		2,796		71,352		5,783,267
Total consumer	$	7,096,481	$	14,719	$	3,018	$	94,819	$	7,209,037

The following table presents consumer loans by credit quality indicator at December 31, 2014.

	Performing		30-89 Days Past Due		Potential Problem		Impaired		Total
	($ Thousands)
Home equity	$	1,017,604	$	8,783	$	880	$	24,660	$	1,051,927
Installment and credit cards	450,698		1,932		2		1,587		454,219
Residential mortgage	4,972,455		4,846		3,781		75,809		5,056,891
Total consumer	$	6,440,757	$	15,561	$	4,663	$	102,056	$	6,563,037

Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate allowance for loan losses, allowance for unfunded commitments, nonaccrual, and charge off policies.

For commercial loans, management has determined the pass credit quality indicator to include credits that exhibit acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits that are performing in accordance with the original contractual terms. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that deserve management’s attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. Potential problem loans are considered inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged. These loans generally have a well-defined weakness, or weaknesses, that may jeopardize liquidation of the debt and are characterized by the distinct possibility that the Corporation will sustain some loss if the deficiencies are not corrected. Lastly, management considers a loan to be impaired when it is probable that the Corporation will be unable to collect all amounts due according to the original contractual terms of the note agreement, including both principal and interest. Management has determined that commercial and consumer loan relationships that have nonaccrual status or have had their terms restructured in a troubled debt restructuring meet this impaired loan definition. Commercial loans classified as special mention, potential problem, and impaired are reviewed at a minimum on a quarterly basis, while pass and performing rated credits are reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted. See Note 1 for the Corporation’s accounting policy for loans.

The following table presents loans by past due status at December 31, 2015.

	30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due*		Total Past Due		Current		Total
	($ in Thousands)
Accruing loans
Commercial and industrial	$	602	$	409	$	249	$	1,260	$	6,054,239	$	6,055,499
Commercial real estate — owner occupied	7,142		—		—		7,142		903,021		910,163
Lease financing	—		—		—		—		41,609		41,609
Commercial and business lending	7,744		409		249		8,402		6,998,869		7,007,271
Commercial real estate — investor	291		—		—		291		3,225,332		3,225,623
Real estate construction	270		26		—		296		1,160,909		1,161,205
Commercial real estate lending	561		26		—		587		4,386,241		4,386,828
Total commercial	8,305		435		249		8,989		11,385,110		11,394,099
Home equity	6,190		1,729		—		7,919		982,639		990,558
Installment and credit cards	1,195		675		1,399		3,269		416,374		419,643
Residential mortgage	4,491		439		—		4,930		5,726,855		5,731,785
Total consumer	11,876		2,843		1,399		16,118		7,125,868		7,141,986
Total accruing loans	$	20,181	$	3,278	$	1,648	$	25,107	$	18,510,978	$	18,536,085
Nonaccrual loans
Commercial and industrial	$	895	$	16	$	4,848	$	5,759	$	86,182	$	91,941
Commercial real estate — owner occupied	—		2,572		1,301		3,873		4,176		8,049
Lease financing	—		—		—		—		1,634		1,634
Commercial and business lending	895		2,588		6,149		9,632		91,992		101,624
Commercial real estate — investor	3,174		1,158		3,480		7,812		831		8,643
Real estate construction	133		61		427		621		319		940
Commercial real estate lending	3,307		1,219		3,907		8,433		1,150		9,583
Total commercial	4,202		3,807		10,056		18,065		93,142		111,207
Home equity	1,922		1,330		5,833		9,085		6,159		15,244
Installment and credit cards	47		39		151		237		88		325
Residential mortgage	3,984		5,251		17,950		27,185		24,297		51,482
Total consumer	5,953		6,620		23,934		36,507		30,544		67,051
Total nonaccrual loans**	$	10,155	$	10,427	$	33,990	$	54,572	$	123,686	$	178,258
Total loans
Commercial and industrial	$	1,497	$	425	$	5,097	$	7,019	$	6,140,421	$	6,147,440
Commercial real estate — owner occupied	7,142		2,572		1,301		11,015		907,197		918,212
Lease financing	—		—		—		—		43,243		43,243
Commercial and business lending	8,639		2,997		6,398		18,034		7,090,861		7,108,895
Commercial real estate — investor	3,465		1,158		3,480		8,103		3,226,163		3,234,266
Real estate construction	403		87		427		917		1,161,228		1,162,145
Commercial real estate lending	3,868		1,245		3,907		9,020		4,387,391		4,396,411
Total commercial	12,507		4,242		10,305		27,054		11,478,252		11,505,306
Home equity	8,112		3,059		5,833		17,004		988,798		1,005,802
Installment and credit cards	1,242		714		1,550		3,506		416,462		419,968
Residential mortgage	8,475		5,690		17,950		32,115		5,751,152		5,783,267
Total consumer	17,829		9,463		25,333		52,625		7,156,412		7,209,037
Total loans	$	30,336	$	13,705	$	35,638	$	79,679	$	18,634,664	$	18,714,343

* The recorded investment in loans past due 90 days or more and still accruing totaled $2 million at December 31, 2015 (the same as the reported balances for the accruing loans noted above).

** The percent of nonaccrual loans which are current was 69% at December 31, 2015.

The following table presents loans by past due status at December 31, 2014.

	30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due*		Total Past Due		Current		Total
	($ in Thousands)
Accruing loans
Commercial and industrial	$	4,466	$	10,281	$	254	$	15,001	$	5,841,238	$	5,856,239
Commercial real estate — owner occupied	8,429		2,199		—		10,628		971,484		982,112
Lease financing	—		—		—		—		49,728		49,728
Commercial and business lending	12,895		12,480		254		25,629		6,862,450		6,888,079
Commercial real estate — investor	712		496		—		1,208		3,032,592		3,033,800
Real estate construction	951		33		—		984		1,002,573		1,003,557
Commercial real estate lending	1,663		529		—		2,192		4,035,165		4,037,357
Total commercial	14,558		13,009		254		27,821		10,897,615		10,925,436
Home equity	6,988		1,795		52		8,835		1,026,641		1,035,476
Installment and credit cards	1,186		746		1,317		3,249		450,357		453,606
Residential mortgage	3,889		957		—		4,846		4,997,069		5,001,915
Total consumer	12,063		3,498		1,369		16,930		6,474,067		6,490,997
Total accruing loans	$	26,621	$	16,507	$	1,623	$	44,751	$	17,371,682	$	17,416,433
Nonaccrual loans
Commercial and industrial	$	872	$	627	$	10,154	$	11,653	$	38,010	$	49,663
Commercial real estate — owner occupied	3,197		41		8,596		11,834		13,991		25,825
Lease financing	—		—		513		513		1,288		1,801
Commercial and business lending	4,069		668		19,263		24,000		53,289		77,289
Commercial real estate — investor	1,857		459		12,765		15,081		7,604		22,685
Real estate construction	87		73		798		958		4,441		5,399
Commercial real estate lending	1,944		532		13,563		16,039		12,045		28,084
Total commercial	6,013		1,200		32,826		40,039		65,334		105,373
Home equity	1,471		1,766		6,840		10,077		6,374		16,451
Installment and credit cards	96		39		141		276		337		613
Residential mortgage	5,172		3,193		23,492		31,857		23,119		54,976
Total consumer	6,739		4,998		30,473		42,210		29,830		72,040
Total nonaccrual loans**	$	12,752	$	6,198	$	63,299	$	82,249	$	95,164	$	177,413
Total loans
Commercial and industrial	$	5,338	$	10,908	$	10,408	$	26,654	$	5,879,248	$	5,905,902
Commercial real estate — owner occupied	11,626		2,240		8,596		22,462		985,475		1,007,937
Lease financing	—		—		513		513		51,016		51,529
Commercial and business lending	16,964		13,148		19,517		49,629		6,915,739		6,965,368
Commercial real estate — investor	2,569		955		12,765		16,289		3,040,196		3,056,485
Real estate construction	1,038		106		798		1,942		1,007,014		1,008,956
Commercial real estate lending	3,607		1,061		13,563		18,231		4,047,210		4,065,441
Total commercial	20,571		14,209		33,080		67,860		10,962,949		11,030,809
Home equity	8,459		3,561		6,892		18,912		1,033,015		1,051,927
Installment and credit cards	1,282		785		1,458		3,525		450,694		454,219
Residential mortgage	9,061		4,150		23,492		36,703		5,020,188		5,056,891
Total consumer	18,802		8,496		31,842		59,140		6,503,897		6,563,037
Total loans	$	39,373	$	22,705	$	64,922	$	127,000	$	17,466,846	$	17,593,846

* The recorded investment in loans past due 90 days or more and still accruing totaled $2 million at December 31, 2014 (the same as the reported balances for the accruing loans noted above).

** The percent of nonaccrual loans which are current was 54% at December 31, 2014.

The following table presents impaired loans at December 31, 2015.

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized*
	($ in Thousands)
Loans with a related allowance
Commercial and industrial	$	57,785	$	59,409	$	8,162	$	46,833	$	855
Commercial real estate — owner occupied	9,705		9,804		448		10,087		412
Lease financing	—		—		—		—		—
Commercial and business lending	67,490		69,213		8,610		56,920		1,267
Commercial real estate — investor	27,822		29,444		1,831		28,278		1,914
Real estate construction	1,450		2,154		453		1,667		66
Commercial real estate lending	29,272		31,598		2,284		29,945		1,980
Total commercial	96,762		100,811		10,894		86,865		3,247
Home equity	21,769		23,989		10,118		22,624		1,147
Installment and credit cards	1,154		1,225		195		1,199		30
Residential mortgage	66,590		71,084		12,462		68,183		2,374
Total consumer	89,513		96,298		22,775		92,006		3,551
Total loans	$	186,275	$	197,109	$	33,669	$	178,871	$	6,798
Loans with no related allowance
Commercial and industrial	$	63,449	$	70,625	$	—	$	77,666	$	1,657
Commercial real estate — owner occupied	6,221		6,648		—		6,534		15
Lease financing	1,634		1,634		—		1,907		—
Commercial and business lending	71,304		78,907		—		86,107		1,672
Commercial real estate — investor	2,736		2,840		—		2,763		90
Real estate construction	—		—		—		—		—
Commercial real estate lending	2,736		2,840		—		2,763		90
Total commercial	74,040		81,747		—		88,870		1,762
Home equity	544		544		—		544		30
Installment and credit cards	—		—		—		—		—
Residential mortgage	4,762		5,033		—		4,726		126
Total consumer	5,306		5,577		—		5,270		156
Total loans	$	79,346	$	87,324	$	—	$	94,140	$	1,918
Total
Commercial and industrial	$	121,234	$	130,034	$	8,162	$	124,499	$	2,512
Commercial real estate — owner occupied	15,926		16,452		448		16,621		427
Lease financing	1,634		1,634		—		1,907		—
Commercial and business lending	138,794		148,120		8,610		143,027		2,939
Commercial real estate — investor	30,558		32,284		1,831		31,041		2,004
Real estate construction	1,450		2,154		453		1,667		66
Commercial real estate lending	32,008		34,438		2,284		32,708		2,070
Total commercial	170,802		182,558		10,894		175,735		5,009
Home equity	22,313		24,533		10,118		23,168		1,177
Installment and credit cards	1,154		1,225		195		1,199		30
Residential mortgage	71,352		76,117		12,462		72,909		2,500
Total consumer	94,819		101,875		22,775		97,276		3,707
Total loans**	$	265,621	$	284,433	$	33,669	$	273,011	$	8,716

* Interest income recognized included $4 million of interest income recognized on accruing restructured loans for the year ended December 31, 2015.

** 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 December 31, 2015.

The following table presents impaired loans at December 31, 2014.

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized*
	($ in Thousands)
Loans with a related allowance
Commercial and industrial	$	76,433	$	80,414	$	16,467	$	80,004	$	3,139
Commercial real estate — owner occupied	19,839		21,807		3,221		20,878		681
Lease financing	1,801		1,801		574		2,009		—
Commercial and business lending	98,073		104,022		20,262		102,891		3,820
Commercial real estate — investor	36,841		40,869		3,587		38,657		1,250
Real estate construction	3,043		5,910		1,095		3,818		105
Commercial real estate lending	39,884		46,779		4,682		42,475		1,355
Total commercial	137,957		150,801		24,944		145,366		5,175
Home equity	23,874		26,585		11,382		25,087		1,257
Installment and credit cards	1,587		1,795		308		1,736		58
Residential mortgage	68,748		74,005		13,797		70,030		2,307
Total consumer	94,209		102,385		25,487		96,853		3,622
Total loans	$	232,166	$	253,186	$	50,431	$	242,219	$	8,797
Loans with no related allowance
Commercial and industrial	$	7,122	$	12,634	$	—	$	8,851	$	82
Commercial real estate — owner occupied	16,440		19,019		—		17,970		219
Commercial and business lending	23,562		31,653		—		26,821		301
Commercial real estate — investor	8,971		14,036		—		10,014		133
Real estate construction	3,083		3,815		—		3,241		—
Commercial real estate lending	12,054		17,851		—		13,255		133
Total commercial	35,616		49,504		—		40,076		434
Home equity	786		806		—		851		18
Installment and credit cards	—		—		—		—		—
Residential mortgage	7,061		7,315		—		7,224		135
Total consumer	7,847		8,121		—		8,075		153
Total loans	$	43,463	$	57,625	$	—	$	48,151	$	587
Total
Commercial and industrial	$	83,555	$	93,048	$	16,467	$	88,855	$	3,221
Commercial real estate — owner occupied	36,279		40,826		3,221		38,848		900
Lease financing	1,801		1,801		574		2,009		—
Commercial and business lending	121,635		135,675		20,262		129,712		4,121
Commercial real estate — investor	45,812		54,905		3,587		48,671		1,383
Real estate construction	6,126		9,725		1,095		7,059		105
Commercial real estate lending	51,938		64,630		4,682		55,730		1,488
Total commercial	173,573		200,305		24,944		185,442		5,609
Home equity	24,660		27,391		11,382		25,938		1,275
Installment and credit cards	1,587		1,795		308		1,736		58
Residential mortgage	75,809		81,320		13,797		77,254		2,442
Total consumer	102,056		110,506		25,487		104,928		3,775
Total loans**	$	275,629	$	310,811	$	50,431	$	290,370	$	9,384

* Interest income recognized included $5 million of interest income recognized on accruing restructured loans for the year ended December 31, 2014.

** The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 72% of of the unpaid principal balance at December 31, 2014.

Troubled Debt Restructurings (“Restructured Loans”):

Loans are considered restructured loans if concessions have been granted to borrowers that are experiencing financial difficulty. See Note 1 for the Corporation’s accounting policy for troubled debt restructurings. As of December 31, 2015, there was approximately $7 million of commitments to lend additional funds to borrowers with restructured loans. The following table presents nonaccrual and performing restructured loans by loan portfolio.

	December 31, 2015				December 31, 2014				December 31, 2013
	Performing Restructured Loans		Nonaccrual Restructured Loans*		Performing Restructured Loans		Nonaccrual Restructured Loans*		Performing Restructured Loans		Nonaccrual Restructured Loans*
	($ in Thousands)
Commercial and industrial	$	29,293	$	1,714	$	33,892	$	3,260	$	32,517	$	6,900
Commercial real estate — owner occupied	7,877		2,703		10,454		5,656		13,009		10,999
Commercial real estate — investor	21,915		3,936		23,127		15,216		44,946		18,069
Real estate construction	510		177		727		2,438		3,793		2,065
Home equity	7,069		4,522		8,209		4,838		8,197		4,441
Installment and credit cards	829		40		974		199		246		451
Residential mortgage	19,870		24,592		20,833		26,049		21,277		16,660
	$	87,363	$	37,684	$	98,216	$	57,656	$	123,985	$	59,585

* Nonaccrual restructured loans have been included within nonaccrual loans.

The following table provides the number of loans modified in a troubled debt restructuring by loan portfolio during the years ended December 31, 2015, 2014 and 2013, respectively, and the recorded investment and unpaid principal balance as of December 31, 2015, 2014 and 2013, respectively.

	Year Ended December 31, 2015					Year Ended December 31, 2014					Year Ended December 31, 2013
	Number of Loans	Recorded Investment(1)		Unpaid Principal Balance(2)		Number of Loans	Recorded Investment(1)		Unpaid Principal Balance(2)		Number of Loans	Recorded Investment(1)		Unpaid Principal Balance(2)
	($ in Thousands)
Commercial and industrial	12	$	2,219	$	2,900	15	$	7,681	$	7,711	48	$	11,833	$	14,543
Commercial real estate — owner occupied	5	3,694		3,901		4	1,465		1,625		12	8,823		9,035
Commercial real estate — investor	5	21,573		21,640		6	6,097		6,521		25	26,480		28,516
Real estate construction	4	78		79		2	15		15		9	1,822		1,961
Home equity	88	3,103		3,249		117	3,913		4,308		82	3,991		4,242
Installment and credit cards	—	—		—		2	24		26		3	193		200
Residential mortgage	97	10,464		10,996		163	19,675		20,454		99	10,910		12,822
	211	$	41,131	$	42,765	309	$	38,870	$	40,660	278	$	64,052	$	71,319

(1) Represents post-modification outstanding recorded investment.

(2) Represents pre-modification outstanding recorded investment.

Restructured loan modifications may include payment schedule modifications, interest rate concessions, maturity date extensions, modification of note structure (A/B Note), non-reaffirmed Chapter 7 bankruptcies, principal reduction, or some combination of these concessions. For the year ended December 31, 2015, restructured loan modifications of commercial and industrial, commercial real estate, and real estate construction loans primarily included maturity date extensions and payment schedule modifications. Restructured loan modifications of home equity and residential mortgage loans primarily included maturity date extensions, interest rate concessions, payment schedule modifications, non-reaffirmed Chapter 7 bankruptcies, or a combination of these concessions for the year ended December 31, 2015.

The following table provides the number of loans modified in a troubled debt restructuring during the previous 12 months which subsequently defaulted during the years ended December 31, 2015, 2014, and 2013, respectively, as well as the recorded investment in these restructured loans as of December 31, 2015, 2014, and 2013, respectively.

	Year Ended December 31, 2015			Year Ended December 31, 2014			Year Ended December 31, 2013
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	($ in Thousands)
Commercial and industrial	2	$	197	1	$	52	15	$	1,493
Commercial real estate — owner occupied	—	—		3	785		4	542
Commercial real estate — investor	—	—		13	6,200		4	1,784
Real estate construction	—	—		1	160		4	80
Home equity	28	1,220		54	1,802		11	829
Installment and credit cards	—	—		3	34		—	—
Residential mortgage	61	6,815		80	10,032		26	4,528
	91	$	8,232	155	$	19,065	64	$	9,256

All loans modified in a troubled debt restructuring are evaluated for impairment. The nature and extent of the impairment of restructured loans, including those which have experienced a subsequent payment default, is considered in the determination of an appropriate level of the allowance for loan losses.