Loans and Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019 and 2018:

(in thousands)	2019		2018
Commercial non-real estate	$	9,166,947	$	8,620,601
Commercial real estate - owner occupied		2,738,460		2,457,748
Total commercial and industrial		11,905,407		11,078,349
Commercial real estate - income producing		2,994,448		2,341,779
Construction and land development		1,157,451		1,548,335
Residential mortgages		2,990,631		2,910,081
Consumer		2,164,818		2,147,867
Total loans	$	21,212,755	$	20,026,411

Allowance for Credit Losses by Portfolio Segment and Allowance for Loan Losses by Portfolio Segment

The following schedules show activity in the allowance for credit losses by portfolio segment for the year ended December 31, 2019 and the activity in the allowance for loan losses by portfolio segment for the year ended December 31, 2018, as well as the corresponding recorded investment in loans at December 31, 2019 and 2018.

	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

	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, 2018
Allowance for loan losses:
Beginning balance	$	127,918		$	12,962		$	140,880		$	13,709		$	7,372		$	24,844		$	30,503		$	217,308
Charge-offs		(40,069	)		(8,059	)		(48,128	)		(1,633	)		(334	)		(614	)		(23,913	)		(74,622	)
Recoveries		14,385			317			14,702			221			96			2,179			5,162			22,360
Net provision for loan losses		(4,482	)		8,537			4,055			5,341			8,513			(2,627	)		20,834			36,116
Other		—			—			—			—			—			—			(6,648	)		(6,648	)
Ending balance - allowance for loan losses	$	97,752		$	13,757		$	111,509		$	17,638		$	15,647		$	23,782		$	25,938		$	194,514
Allowance for loan losses:
Individually evaluated for impairment	$	3,636		$	607		$	4,243		$	210		$	1		$	444		$	216		$	5,114
Amounts related to purchased credit impaired loans		239			215			454			43			83			9,766			388			10,734
Collectively evaluated for impairment		93,877			12,935			106,812			17,385			15,563			13,572			25,334			178,666
Total allowance for loan losses	$	97,752		$	13,757		$	111,509		$	17,638		$	15,647		$	23,782		$	25,938		$	194,514
Loans:
Individually evaluated for impairment	$	239,384		$	21,666		$	261,050		$	2,701		$	121		$	3,876		$	1,007		$	268,755
Purchased credit impaired loans		6,629			6,212			12,841			3,757			3,387			105,430			4,181			129,596
Collectively evaluated for impairment		8,374,588			2,429,870			10,804,458			2,335,321			1,544,827			2,800,775			2,142,679			19,628,060
Total loans	$	8,620,601		$	2,457,748		$	11,078,349		$	2,341,779		$	1,548,335		$	2,910,081		$	2,147,867		$	20,026,411

Composition of Nonaccrual Loans by Portfolio Class

The following table shows the composition of nonaccrual loans by portfolio class.  Purchased credit impaired loans accounted for in pools with an accretable yield are considered to be performing and are excluded from the table.

	December 31,
(in thousands)	2019		2018
Commercial non-real estate	$	178,678	$	110,653
Commercial real estate - owner occupied		7,708		16,895
Total commercial and industrial		186,386		127,548
Commercial real estate - income producing		2,594		4,991
Construction and land development		1,217		2,146
Residential mortgages		39,262		35,866
Consumer		16,374		16,744
Total loans	$	245,833	$	187,295

Troubled Debt Restructurings Modified by Portfolio Segment

The table below details TDRs that were modified during the years ended December 31, 2019, 2018 and 2017 by portfolio segment. All such loans are individually evaluated for impairment.

	Years Ended
($ in thousands)	2019						2018						2017
			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		13	$	64,051	$	57,240		29	$	85,306	$	85,306		52	$	162,909	$	162,909
Commercial real estate - owner occupied		1		167		167		2		6,138		6,138		5		5,684		5,684
Total commercial and industrial		14		64,218		57,407		31		91,444		91,444		57		168,593		168,593
Commercial real estate - income producing		1		123		123		1		1,564		1,564		5		5,625		5,625
Construction and land development		3		323		323		—		—		—		—		—		—
Residential mortgages		21		3,286		3,286		14		1,297		1,297		15		2,812		2,812
Consumer		10		168		168		10		455		455		1		40		40
Total loans		49	$	68,118	$	61,307		56	$	94,760	$	94,760		78	$	177,070	$	177,070

Loans Individually Evaluated for Impairment Disaggregated by Portfolio Class

The tables below present loans that are individually evaluated for impairment disaggregated by portfolio class at December 31, 2019 and 2018.

	December 31, 2019
(in thousands)	Recorded Investment Without an Allowance		Recorded Investment With an Allowance		Unpaid Principal Balance		Related Allowance
Commercial non-real estate	$	134,191	$	98,247	$	270,078	$	21,733
Commercial real estate - owner occupied		2,665		1,716		7,793		104
Total commercial and industrial		136,856		99,963		277,871		21,837
Commercial real estate - income producing		373		1,525		1,959		18
Construction and land development		—		277		322		21
Residential mortgages		3,383		1,791		5,709		217
Consumer		479		1,004		1,906		292
Total loans	$	141,091	$	104,560	$	287,767	$	22,385

	December 31, 2018
(in thousands)	Recorded Investment Without an Allowance		Recorded Investment With an Allowance		Unpaid Principal Balance		Related Allowance
Commercial non-real estate	$	144,625	$	94,759	$	273,290	$	3,636
Commercial real estate - owner occupied		13,027		8,639		25,888		607
Total commercial and industrial		157,652		103,398		299,178		4,243
Commercial real estate - income producing		1,138		1,563		3,428		210
Construction and land development		100		21		121		1
Residential mortgages		2,058		1,818		4,421		444
Consumer		279		728		1,253		216
Total loans	$	161,227	$	107,528	$	308,401	$	5,114

The tables below present the average balances and interest income for total impaired loans for the years ended December 31, 2019 and 2018. Interest income recognized represents interest on accruing loans modified in a TDR.

	Years Ended
	December 31, 2019				December 31, 2018
(in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Commercial non-real estate	$	223,500	$	4,917	$	286,146	$		7,919
Commercial real estate - owner occupied		14,719		196		25,325			343
Total commercial and industrial		238,219		5,113		311,471			8,262
Commercial real estate - income producing		2,407		27		9,155		71
Construction and land development		906		4		145			—
Residential mortgages		4,578		11		5,598			18
Consumer		1,464		77		814			39
Total loans	$	247,574	$	5,232	$	327,183	$		8,390

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, 2019 and 2018. Purchased credit impaired loans with an accretable yield are considered to be current:

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

December 31, 2018	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	$	12,257	$	3,895	$	77,551	$	93,703	$	8,526,898	$	8,620,601	$	10,823
Commercial real estate - owner occupied		2,394		1,570		14,542		18,506		2,439,242		2,457,748		380
Total commercial and industrial		14,651		5,465		92,093		112,209		10,966,140		11,078,349		11,203
Commercial real estate - income producing		2,371		772		5,495		8,638		2,333,141		2,341,779		1,844
Construction and land development		7,397		1,129		2,165		10,691		1,537,644		1,548,335		644
Residential mortgages		32,869		14,706		23,175		70,750		2,839,331		2,910,081		—
Consumer		20,402		4,695		9,665		34,762		2,113,105		2,147,867		618
Total loans	$	77,690	$	26,767	$	132,593	$	237,050	$	19,789,361	$	20,026,411	$	14,309

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 years ended December 31, 2019 and 2018:

	2019						2018
	Carrying						Carrying
	Amount			Accretable			Amount			Accretable
(in thousands)	of Loans			Yield			of Loans			Yield
Balance at beginning of period	$	129,596		$	37,294		$	153,403		$	62,517
Additions		120,562			6,246			—			—
Payments received, net		(48,076	)		(4,601	)		(39,556	)		(5,779	)
Accretion		13,163			(13,163	)		15,749			(15,749	)
Increase (decrease) in expected cash flows based on actual    cash flow and changes in cash flow assumptions		—			4,170			—			(3,695	)
Balance at end of period	$	215,245		$	29,946		$	129,596		$	37,294

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 classes by segments and portfolio class of loans at December 31, 2019 and December 31, 2018.

	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

	December 31, 2018
(in thousands)	Commercial Non- Real Estate		Commercial Real Estate - Owner Occupied		Total Commercial & Industrial		Commercial Real Estate - Income Producing		Construction and Land Development		Total Commercial
Grade:
Pass	$	7,875,588	$	2,274,211	$	10,149,799	$	2,265,087	$	1,487,599	$	13,902,485
Pass-Watch		260,510		84,271		344,781		46,535		49,099		440,415
Special Mention		75,752		23,149		98,901		5,510		816		105,227
Substandard		408,751		76,117		484,868		24,647		10,821		520,336
Doubtful		—		—		—		—		—		—
Total	$	8,620,601	$	2,457,748	$	11,078,349	$	2,341,779	$	1,548,335	$	14,968,463

Residential Mortgage and Consumer [Member]

Accounts Notes And Loans Receivable [Line Items]

Credit Quality Indicators by Segments and Portfolio Class

	December 31, 2019						December 31, 2018
(in thousands)	Residential Mortgage		Consumer		Total		Residential Mortgage		Consumer		Total
Performing	$	2,950,854	$	2,147,312	$	5,098,166	$	2,873,669	$	2,130,395	$	5,004,064
Nonperforming		39,777		17,506		57,283		36,412		17,472		53,884
Total	$	2,990,631	$	2,164,818	$	5,155,449	$	2,910,081	$	2,147,867	$	5,057,948