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Loans and Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2020

Accounts Notes And Loans Receivable [Line Items]

Loans, Net of Unearned Income

The following table presents loans, net of unearned income, by portfolio class at December 31, 2020 and 2019:

(in thousands)		2020					2019
Commercial non-real estate		$		9,986,983			$		9,166,947
Commercial real estate - owner occupied				2,857,445					2,738,460
Total commercial and industrial				12,844,428					11,905,407
Commercial real estate - income producing				3,357,939					2,994,448
Construction and land development				1,065,057					1,157,451
Residential mortgages				2,665,212					2,990,631
Consumer				1,857,295					2,164,818
Total loans		$		21,789,931			$		21,212,755

Allowance for Credit Losses by Portfolio Class

The following schedules show activity in the allowance for credit losses by portfolio class for the years ended December 31, 2020 and 2019, as well as the corresponding recorded investment in loans at December 31, 2020 and 2019. Effective January 1, 2020, the Company adopted the provisions of ASC 326 (CECL) using a modified retrospective basis. The difference between the December 31,

2019 incurred allowance and the CECL allowance is reflected as a cumulative effect of change in accounting principle in the table below. For further discussion of the day one impact of the CECL adoption, refer to Note 1 – Summary of Significant Accounting Policies and Recent Accounting Pronouncements.

		Commercial Non-Real Estate					Commercial Real Estate- Owner Occupied					Total Commercial and Industrial					Commercial Real Estate- Income Producing					Construction and Land Development					Residential Mortgages					Consumer					Total
(in thousands)		Year Ended December 31, 2020
Allowance for credit losses
Allowance for loan losses:
Beginning balance		$		106,432			$		10,977			$		117,409			$		20,869			$		9,350			$		20,331			$		23,292			$		191,251
Cumulative effect of change in accounting principle				(244	)				14,877					14,633					7,287					7,478					12,921					7,092					49,411
Charge-offs				(387,172	)				(1,828	)				(389,000	)				(2,512	)				(400	)				(326	)				(17,219	)				(409,457	)
Recoveries				6,032					763					6,795					46					846					1,400					5,584					14,671
Net provision for loan losses				424,645					44,345					468,990					83,784					9,188					14,516					27,823					604,301
Ending balance - allowance for loan losses		$		149,693			$		69,134			$		218,827			$		109,474			$		26,462			$		48,842			$		46,572			$		450,177
Reserve for unfunded lending commitments:
Beginning balance		$		3,974			$		—			$		3,974			$		—			$		—			$		—			$		—			$		3,974
Cumulative effect of change in accounting principle				5,772					288					6,060					449					15,658					17					5,146					27,330
Provision for losses on unfunded commitments				(5,217	)				93					(5,124	)				650					7,036					2					(3,961	)				(1,397	)
Ending balance - reserve for unfunded lending commitments		$		4,529			$		381			$		4,910			$		1,099			$		22,694			$		19			$		1,185			$		29,907
Total allowance for credit losses		$		154,222			$		69,515			$		223,737			$		110,573			$		49,156			$		48,861			$		47,757			$		480,084
Allowance for loan losses:
Individually evaluated		$		11,517			$		1,236			$		12,753			$		44			$		22			$		546			$		515			$		13,880
Collectively evaluated				138,176					67,898					206,074					109,430					26,440					48,296					46,057					436,297
Allowance for loan losses		$		149,693			$		69,134			$		218,827			$		109,474			$		26,462			$		48,842			$		46,572			$		450,177
Reserve for unfunded lending commitments:
Individually evaluated		$		241			$		—			$		241			$		—			$		—			$		—			$		—			$		241
Collectively evaluated				4,288					381					4,669					1,099					22,694					19					1,185					29,666
Reserve for unfunded lending commitments:		$		4,529			$		381			$		4,910			$		1,099			$		22,694			$		19			$		1,185			$		29,907
Total allowance for credit losses		$		154,222			$		69,515			$		223,737			$		110,573			$		49,156			$		48,861			$		47,757			$		480,084
Loans:
Individually evaluated for impairment		$		43,775			$		10,206			$		53,981			$		4,542			$		1,250			$		5,850			$		2,521			$		68,144
Collectively evaluated for impairment				9,943,208					2,847,239					12,790,447					3,353,397					1,063,807					2,659,362					1,854,774					21,721,787
Total loans		$		9,986,983			$		2,857,445			$		12,844,428			$		3,357,939			$		1,065,057			$		2,665,212			$		1,857,295			$		21,789,931

		Commercial Non-Real Estate			Commercial Real Estate- Owner Occupied			Total Commercial and Industrial			Commercial Real Estate- Income Producing			Construction and Land Development			Residential Mortgages			Consumer			Total
(in thousands)		Year Ended December 31, 2019
Allowance for credit losses
Allowance for loan losses:
Beginning balance		$	97,752		$	13,757		$	111,509		$	17,638		$	15,647		$	23,782		$	25,938		$	194,514
Charge-offs			(39,600)			(137)			(39,737)			(32)			(7)			(846)			(18,455)			(59,077)
Recoveries			6,940			306			7,246			569			140			480			3,645			12,080
Net provision for loan losses			41,340			(2,949)			38,391			2,694			(6,430)			(3,085)			12,164			43,734
Ending balance - allowance for loan losses		$	106,432		$	10,977		$	117,409		$	20,869		$	9,350		$	20,331		$	23,292		$	191,251
Reserve for unfunded lending commitments:
Beginning balance		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—
Provision for losses on unfunded commitments			3,974			—			3,974			—			—			—			—			3,974
Ending balance - reserve for unfunded lending commitments		$	3,974		$	—		$	3,974		$	—		$	—		$	—		$	—		$	3,974
Total allowance for credit losses		$	110,406		$	10,977		$	121,383		$	20,869		$	9,350		$	20,331		$	23,292		$	195,225
Allowance for loan losses:
Individually evaluated for impairment		$	21,733		$	104		$	21,837		$	18		$	21		$	217		$	292		$	22,385
Amounts related to purchased credit impaired loans			164			169			333			39			136			7,474			275			8,257
Collectively evaluated for impairment			84,535			10,704			95,239			20,812			9,193			12,640			22,725			160,609
Allowance for loan losses		$	106,432		$	10,977		$	117,409		$	20,869		$	9,350		$	20,331		$	23,292		$	191,251
Reserve for unfunded lending commitments:
Individually evaluated for impairment		$	3,974		$	—		$	3,974		$	—		$	—		$	—		$	—		$	3,974
Total allowance for credit losses		$	110,406		$	10,977		$	121,383		$	20,869		$	9,350		$	20,331		$	23,292		$	195,225
Loans:
Individually evaluated for impairment		$	232,438		$	4,381		$	236,819		$	1,898		$	277		$	5,174		$	1,483		$	245,651
Purchased credit impaired loans			31,073			36,200			67,273			35,353			20,516			86,757			5,346			215,245
Collectively evaluated for impairment			8,903,436			2,697,879			11,601,315			2,957,197			1,136,658			2,898,700			2,157,989			20,751,859
Total loans		$	9,166,947		$	2,738,460		$	11,905,407		$	2,994,448		$	1,157,451		$	2,990,631		$	2,164,818		$	21,212,755

Nonaccrual Loans and Without an Allowance for Loan Loss by Portfolio Class

The following table presents total nonaccrual loans and those without an allowance for loan loss, by portfolio class.  Prior to the adoption of CECL, purchased credit impaired loans accounted for in pools with an accretable yield were considered to be performing and are therefore excluded. Such loans totaled $17.5 million at December 31, 2019.

		December 31,
		2020											2019
(in thousands)			Total nonaccrual					Nonaccrual without allowance for loan loss					Total nonaccrual					Nonaccrual without allowance for loan loss
Commercial non-real estate		$		52,836			$		15,268			$		178,678			$		97,700
Commercial real estate - owner occupied				13,856					7,038					7,708					2,458
Total commercial and industrial				66,692					22,306					186,386					100,158
Commercial real estate - income producing				6,743					—					2,594					—
Construction and land development				2,486					1,116					1,217					—
Residential mortgages				40,573					1,705					39,262					3,383
Consumer				23,385					—					16,374					351
Total loans		$		139,879			$		25,127			$		245,833			$		103,892

Troubled Debt Restructurings Modified by Portfolio Segment

The table below presents detail on loans modified in TDRs during the years ended December 31, 2020, 2019 and 2018 by portfolio segment. All such loans are individually evaluated for credit loss.

		Years Ended
($ in thousands)		2020														2019														2018
						Outstanding Recorded Investment														Outstanding Recorded Investment														Outstanding Recorded Investment
Troubled Debt Restructurings:		Number of Contracts				Pre- Modification					Post- Modification					Number of Contracts				Pre- Modification					Post- Modification					Number of Contracts				Pre- Modification					Post- Modification
Commercial non-real estate			3			$		745			$		745				13			$		64,051			$		57,240				29			$		85,306			$		85,306
Commercial real estate - owner occupied			1					297					297				1					167					167				2					6,138					6,138
Total commercial and industrial			4					1,042					1,042				14					64,218					57,407				31					91,444					91,444
Commercial real estate - income producing			—					—					—				1					123					123				1					1,564					1,564
Construction and land development			1					15					15				3					323					323				—					—					—
Residential mortgages			15					3,424					3,424				21					3,286					3,286				14					1,297					1,297
Consumer			6					89					89				10					168					168				10					455					455
Total loans			26			$		4,570			$		4,570				49			$		68,118			$		61,307				56			$		94,760			$		94,760

Loans Individually Evaluated for Impairment Disaggregated by Portfolio Class

Prior to the adoption of CECL, the Company accounted for impaired loans as prescribed by ASC 310. The following provides detail regarding the Company’s impaired loans at and for the year ended December 31, 2019. Interest income recognized represents interest on accruing loans modified in a TDR.

		December 31, 2019
(in thousands)		Recorded Investment Without an Allowance					Recorded Investment With an Allowance					Unpaid Principle Balance							Related Allowance							Average Recorded Investment					Interest Income Recognized
Commercial non-real estate		$		134,191			$		98,247			$		270,078					$		21,733					$		223,500			$		4,917
Commercial real estate - owner occupied				2,665					1,716					7,793							104							14,719					196
Total commercial and industrial				136,856					99,963					277,871							21,837							238,219					5,113
Commercial real estate - income producing				373					1,525					1,959							18							2,407					27
Construction and land development				—					277					322							21							906					4
Residential mortgages				3,383					1,791					5,709							217							4,578					11
Consumer				479					1,004					1,906							292							1,464					77
Total loans		$		141,091			$		104,560			$		287,767					$		22,385					$		247,574			$		5,232

Age Analysis of Past Due Loans by Portfolio Class

The tables below present the age analysis of past due loans by portfolio class at December 31, 2020 and 2019. Prior to the adoption of CECL, purchased credit impaired loans with an accretable yield were considered to be current in the table below as of December 31, 2019. These loans totaled $6.1 million for 30-59 days past due, $2.0 million for 60-89 days past due and $8.3 million for both greater than 90 days past due and greater than 90 days past due and still accruing at December 31, 2019.   

December 31, 2020		30-59 Days Past Due			60-89 Days Past Due			Greater Than 90 Days past due			Total Past Due			Current			Total Loans			Recorded Investment > 90 Days and Accruing
(in thousands)
Commercial non-real estate		$	7,963		$	2,564		$	39,530		$	50,057		$	9,936,926		$	9,986,983		$	583
Commercial real estate - owner occupied			1,525			753			13,663			15,941			2,841,504			2,857,445			955
Total commercial and industrial			9,488			3,317			53,193			65,998			12,778,430			12,844,428			1,538
Commercial real estate - income producing			1,494			798			5,744			8,036			3,349,903			3,357,939			182
Construction and land development			4,168			284			2,001			6,453			1,058,604			1,065,057			—
Residential mortgages			29,319			9,858			27,886			67,063			2,598,149			2,665,212			912
Consumer			12,215			5,012			11,714			28,941			1,828,354			1,857,295			729
Total loans		$	56,684		$	19,269		$	100,538		$	176,491		$	21,613,440		$	21,789,931		$	3,361

December 31, 2019		30-59 Days Past Due					60-89 Days Past Due					Greater Than 90 Days Past Due					Total Past Due					Current					Total Loans					Recorded Investment > 90 Days and Accruing
(in thousands)
Commercial non-real estate		$		20,893			$		13,445			$		100,806			$		135,144			$		9,031,803			$		9,166,947			$		1,537
Commercial real estate - owner occupied				4,862					556					7,268					12,686					2,725,774					2,738,460					830
Total commercial and industrial				25,755					14,001					108,074					147,830					11,757,577					11,905,407					2,367
Commercial real estate - income producing				738					703					2,910					4,351					2,990,097					2,994,448					450
Construction and land development				5,747					680					2,480					8,907					1,148,544					1,157,451					2,042
Residential mortgages				32,867					8,584					23,577					65,028					2,925,603					2,990,631					85
Consumer				18,586					6,215					9,901					34,702					2,130,116					2,164,818					1,638
Total loans		$		83,693			$		30,183			$		146,942			$		260,818			$		20,951,937			$		21,212,755			$		6,582

Credit Quality Indicators by Segments and Portfolio Class

The following table presents credit quality disclosures of amortized cost by segment and vintage for term loans and by revolving and revolving converted to amortizing at December 31, 2020. The Company defines vintage as the later of origination, renewal or restructure date.

	Term Loans
	Amortized Cost Basis by Origination Year
		2020				2019				2018				2017				2016				Prior				Revolving Loans				Revolving Loans Converted to Term Loans				Total
Commercial Loans:
Pass		$	5,673,370			$	2,819,696			$	1,740,784			$	1,391,140			$	960,094			$	1,231,913			$	2,420,058			$	95,847			$	16,332,902
Pass-Watch			115,555				96,473				50,475				42,877				58,331				84,363				74,629				19,182				541,885
Special Mention			3,196				27,157				21,074				30,872				28,933				4,146				18,626				3,588				137,592
Substandard			75,461				33,844				20,527				35,383				15,071				36,589				30,162				8,008				255,045
Doubtful			—				—				—				—				—				—				—				—				—
Total Commercial Loans		$	5,867,582			$	2,977,170			$	1,832,860			$	1,500,272			$	1,062,429			$	1,357,011			$	2,543,475			$	126,625			$	17,267,424
Residential Mortgage and Consumer Loans:
Performing		$	438,831			$	504,124			$	437,518			$	560,347			$	501,018			$	816,567			$	1,190,775			$	6,127			$	4,455,307
Nonperforming			1,466				3,781				5,881				8,380				3,981				35,500				3,652				4,559				67,200
Total Consumer Loans		$	440,297			$	507,905			$	443,399			$	568,727			$	504,999			$	852,067			$	1,194,427			$	10,686			$	4,522,507

Changes in Carrying Amount of Purchased Credit Impaired Loans and Related Accretable Yield

Changes in the carrying amount of purchased credit impaired loans and related accretable yield are presented in the following table for the year ended December 31, 2019:

		2019
		Carrying
		Amount					Accretable
(in thousands)		of Loans					Yield
Balance at beginning of period		$		129,596			$		37,294
Additions				120,562					6,246
Payments received, net				(48,076	)				(4,601	)
Accretion				13,163					(13,163	)
Increase in expected cash flows based on actual cash flow and changes in cash flow assumptions				—					4,170
Balance at end of period		$		215,245			$		29,946

Total Commercial [Member]

Accounts Notes And Loans Receivable [Line Items]

Credit Quality Indicators by Segments and Portfolio Class

The tables below present the credit quality indicators by portfolio class and segment of loans at December 31, 2020 and December 31, 2019. The Company routinely assesses the ratings of loans in its portfolio through an established and comprehensive portfolio management process. In addition, the Company often examines portfolios of loans to determine if there are areas of risk not specifically identified in its loan by loan approach. As a result, several loans were downgraded to pass-watch in 2020 in reaction to the economic downturn caused by the pandemic and other environmental factors. In alignment with regulatory guidance, the Company has been working with its customers to manage through this period of severe uncertainty and economic stress, including providing various types of loan deferrals. While the majority of these deferrals have expired, our ability to predict future cash flow is limited due to the economic uncertainty, and we expect that further risk rating adjustments may be required.

		December 31, 2020
(in thousands)		Commercial Non- Real Estate					Commercial Real Estate - Owner Occupied					Total Commercial and Industrial					Commercial Real Estate - Income Producing					Construction and Land Development					Total Commercial
Grade:
Pass		$		9,439,264			$		2,641,423			$		12,080,687			$		3,219,155			$		1,033,060			$		16,332,902
Pass-Watch				314,739					114,358					429,097					89,968					22,820					541,885
Special Mention				79,613					46,239					125,852					5,989					5,751					137,592
Substandard				153,367					55,425					208,792					42,827					3,426					255,045
Doubtful				—					—					—					—					—					—
Total		$		9,986,983			$		2,857,445			$		12,844,428			$		3,357,939			$		1,065,057			$		17,267,424

		December 31, 2019
(in thousands)		Commercial Non- Real Estate					Commercial Real Estate - Owner Occupied					Total Commercial and Industrial					Commercial Real Estate - Income Producing					Construction and Land Development					Total Commercial
Grade:
Pass		$		8,492,113			$		2,517,448			$		11,009,561			$		2,883,553			$		1,120,997			$		15,014,111
Pass-Watch				220,850					146,266					367,116					69,765					25,621					462,502
Special Mention				71,654					14,651					86,305					14,995					283					101,583
Substandard				382,330					60,095					442,425					26,135					10,550					479,110
Doubtful				—					—					—					—					—					—
Total		$		9,166,947			$		2,738,460			$		11,905,407			$		2,994,448			$		1,157,451			$		16,057,306

Residential Mortgage and Consumer [Member]

Accounts Notes And Loans Receivable [Line Items]

Credit Quality Indicators by Segments and Portfolio Class

		December 31, 2020															December 31, 2019
(in thousands)		Residential Mortgage					Consumer					Total					Residential Mortgage					Consumer					Total
Performing		$		2,622,422			$		1,832,885			$		4,455,307			$		2,950,854			$		2,147,312			$		5,098,166
Nonperforming				42,790					24,410					67,200					39,777					17,506					57,283
Total		$		2,665,212			$		1,857,295			$		4,522,507			$		2,990,631			$		2,164,818			$		5,155,449

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- Definition

Tabular disclosure of allowance for credit loss on financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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Tabular disclosure of the reconciliation of contractual cash flows to the carrying amount relating to certain loans acquired in a transfer.

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- Definition

Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
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