Loans and Allowance for Loan Losses (Tables)

9 Months Ended

Sep. 30, 2017

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans, Net of Unearned Income

	September 30,		December 31,
(in thousands)	2017		2016
Commercial non-real estate	$	8,129,429	$	7,613,917
Commercial real estate - owner occupied		2,076,014		1,906,821
Total commercial & industrial		10,205,443		9,520,738
Commercial real estate - income producing		2,511,808		2,013,890
Construction and land development		1,373,048		1,010,879
Residential mortgages		2,596,692		2,146,713
Consumer		2,099,294		2,059,931
Total loans	$	18,786,285	$	16,752,151

Allowance for Loan Losses by Portfolio Class

			Commercial				Commercial
	Commercial		real estate-		Total		real estate-		Construction
		non-real	owner		commercial &		income		and land		Residential
(in thousands)	estate		occupied		industrial		producing		development		mortgages		Consumer		Total
	Nine Months Ended September 30, 2017
Allowance for loan  losses:
Beginning balance	$	147,052	$	11,083	$	158,135	$	13,509	$	6,271	$	25,361	$	26,142	$	229,418
Purchased credit impaired activity:
Charge-offs		—		—		—		—		(77)		(102)		(153)		(332)
Recoveries		5		110		115		—		49		23		72		259
Net provision for loan losses		(27)		(220)		(247)		(54)		(124)		175		(192)		(442)
Decrease in FDIC loss share receivable		(47)		—		(47)		—		—		(2,344)		(135)		(2,526)
Non-purchased credit impaired activity:
Charge-offs		(35,247)		(527)		(35,774)		(160)		(593)		(2,383)		(22,691)		(61,601)
Recoveries		6,437		337		6,774		655		1,001		316		5,176		13,922
Net provision for loan losses		15,922		2,776		18,698		540		54		3,988		21,144		44,424
Ending balance	$	134,095	$	13,559	$	147,654	$	14,490	$	6,581	$	25,034	$	29,363	$	223,122
Ending balance:
Allowance:
Individually evaluated for impairment	$	20,880	$	477	$	21,357	$	1,321	$	1	$	406	$	405	$	23,490
Amounts related to purchased credit impaired loans		417		784		1,201		199		254		12,795		863		15,312
Collectively evaluated for impairment		112,798		12,298		125,096		12,970		6,326		11,833		28,095		184,320
Total allowance	$	134,095	$	13,559	$	147,654	$	14,490	$	6,581	$	25,034	$	29,363	$	223,122
Loans:
Individually evaluated for impairment	$	271,024	$	6,351	$	277,375	$	14,295	$	480	$	8,942	$	1,306	$	302,397
Purchased credit impaired loans		20,186		13,021		33,207		5,353		6,670		123,244		7,637		176,111
Collectively evaluated for impairment		7,838,219		2,056,642		9,894,861		2,492,160		1,365,898		2,464,506		2,090,351		18,307,777
Total loans	$	8,129,429	$	2,076,014	$	10,205,443	$	2,511,808	$	1,373,048	$	2,596,692	$	2,099,294	$	18,786,285

			Commercial				Commercial
	Commercial		real estate-		Total		real estate-		Construction
	non-real		owner		commercial &		income		and land		Residential
(in thousands)	estate		occupied		industrial		producing		development		mortgages		Consumer		Total
	Nine Months Ended September 30, 2016
Allowance for loan  losses:
Beginning balance	$	109,428	$	9,858	$	119,286	$	6,041	$	5,642	$	25,353	$	24,857	$	181,179
Purchased credit impaired activity:
Charge-offs		—		(28)		(28)		(1)		(18)		(91)		(8)		(146)
Recoveries		76		163		239		2		98		33		112		484
Net provision for loan losses		54		(140)		(86)		(436)		(253)		1,685		(1,633)		(723)
(Decrease) increase in FDIC loss share receivable		(2)		—		(2)		—		—		(3,341)		316		(3,027)
Non-purchased credit impaired activity:
Charge-offs		(27,504)		(1,660)		(29,164)		(191)		(827)		(908)		(17,403)		(48,493)
Recoveries		2,709		287		2,996		673		1,422		497		4,272		9,860
Net provision for loan losses		74,500		2,303		76,803		4,862		(216)		964		14,514		96,927
Ending balance	$	159,261	$	10,783	$	170,044	$	10,950	$	5,848	$	24,192	$	25,027	$	236,061
Ending balance:
Allowance:
Individually evaluated for impairment	$	20,665	$	223	$	20,888	$	57	$	6	$	94	$	85	$	21,130
Amounts related to purchased credit impaired loans		574		1,088		1,662		279		484		15,949		1,334		19,708
Collectively evaluated for impairment		138,022		9,472		147,494		10,614		5,358		8,149		23,608		195,223
Total allowance	$	159,261	$	10,783	$	170,044	$	10,950	$	5,848	$	24,192	$	25,027	$	236,061
Loans:
Individually evaluated for impairment	$	235,039	$	6,458	$	241,497	$	7,655	$	2,062	$	3,864	$	1,485	$	256,563
Purchased credit impaired loans		11,534		16,417		27,951		8,087		8,436		145,273		12,045		201,792
Collectively evaluated for impairment		6,887,355		1,878,950		8,766,305		1,974,567		936,094		1,888,025		2,047,475		15,612,466
Total loans	$	7,133,928	$	1,901,825	$	9,035,753	$	1,990,309	$	946,592	$	2,037,162	$	2,061,005	$	16,070,821

Composition of Nonaccrual Loans by Portfolio Class

	September 30,		December 31,
(in thousands)	2017		2016
Commercial non-real estate	$	188,982	$	249,037
Commercial real estate - owner occupied		14,305		14,413
Total commercial & industrial		203,287		263,450
Commercial real estate - income producing		14,360		13,954
Construction and land development		3,292		4,550
Residential mortgages		34,674		23,665
Consumer		14,063		12,351
Total loans	$	269,676	$	317,970

Troubled Debt Restructurings Modified by Portfolio Class

	Nine Months Ended
($ in thousands)		September 30, 2017						September 30, 2016
			Pre-Modification		Post-Modification				Pre-Modification		Post-Modification
			Outstanding		Outstanding				Outstanding		Outstanding
		Number of	Recorded		Recorded			Number of	Recorded		Recorded
Troubled Debt Restructurings:		Contracts	Investment		Investment		Contracts		Investment		Investment
Commercial non-real estate		50	$	135,926	$	135,926		17	$	57,915	$	57,915
Commercial real estate - owner occupied		4		3,734		3,734		—		—		—
Total commercial & industrial		54		139,660		139,660		17		57,915		57,915
Commercial real estate - income producing		5		5,684		5,684		—		—		—
Construction and land development		—		—		—		—		—		—
Residential mortgages		13		2,068		2,068		6		532		532
Consumer		1		40		42		—		—		—
Total loans		73	$	147,452	$	147,454		23	$	58,447	$	58,447

Loans Individually Evaluated for Impairment Disaggregated by Portfolio Class

	September 30, 2017
		Recorded investment		Recorded investment		Unpaid
(in thousands)		without an allowance		with an allowance		principal balance		Related allowance
Commercial non-real estate	$	92,583	$	178,441	$	276,879	$	20,880
Commercial real estate - owner occupied		3,599		2,752		6,353		477
Total commercial & industrial		96,182		181,193		283,232		21,357
Commercial real estate - income producing		5,160		9,135		14,451		1,321
Construction and land development		464		16		1,445		1
Residential mortgages		6,311		2,630		11,961		406
Consumer		1		1,305		1,308		405
Total loans	$	108,118	$	194,279	$	312,397	$	23,490
	December 31, 2016
		Recorded investment		Recorded investment		Unpaid
(in thousands)		without an allowance		with an allowance		principal balance		Related allowance
Commercial non-real estate	$	150,650	$	120,612	$	295,445	$	28,187
Commercial real estate - owner occupied		4,261		2,007		6,646		246
Total commercial & industrial		154,911		122,619		302,091		28,433
Commercial real estate - income producing		10,447		4,929		15,708		466
Construction and land development		1,106		832		2,903		38
Residential mortgages		2,877		1,470		4,865		91
Consumer		—		2,154		2,155		267
Total loans	$	169,341	$	132,004	$	327,722	$	29,295

The tables below present the average balances and interest income for total impaired loans for the three and nine months ended September 30, 2017 and 2016.  Interest income recognized represents interest on accruing loans modified in a TDR.

	Three Months Ended
	September 30, 2017				September 30, 2016
	Average		Interest		Average			Interest
	recorded		income		recorded			income
(in thousands)	investment		recognized		investment			recognized
Commercial non-real estate	$	260,640	$	872	$	233,913	$	155
Commercial real estate - owner occupied		6,916		24		6,374		10
Total commercial & industrial		267,556		896		240,287		165
Commercial real estate - income producing		14,604		35		7,729		24
Construction and land development		663		1		1,655		—
Residential mortgages		6,204		7		2,466		3
Consumer		1,179		4		826		2
Total loans	$	290,206	$	943	$	252,963	$	194

	Nine Months Ended
	September 30, 2017				September 30, 2016
	Average		Interest		Average			Interest
	recorded		income		recorded			income
(in thousands)	investment		recognized		investment			recognized
Commercial non-real estate	$	251,129	$	1,806	$	197,382	$	1,002
Commercial real estate - owner occupied		5,895		46		6,015		39
Total commercial & industrial		257,024		1,852		203,397		1,041
Commercial real estate - income producing		14,449		112		8,624		67
Construction and land development		1,216		1		7,821		—
Residential mortgages		4,449		12		1,444		7
Consumer		1,644		9		348		4
Total loans	$	278,782	$	1,986	$	221,634	$	1,119

Age Analysis of Past Due Loans by Portfolio Class

													Recorded
					Greater than								investment
	30-59 days		60-89 days		90 days		Total				Total		> 90 days and
September 30, 2017	past due		past due		past due		past due		Current		Loans		still accruing
(in thousands)
Commercial non-real estate	$	31,634	$	3,880	$	104,334	$	139,848	$	7,989,581	$	8,129,429	$	24,400
Commercial real estate - owner occupied		18,579		303		8,950		27,832		2,048,182		2,076,014		767
Total commercial & industrial		50,213		4,183		113,284		167,680		10,037,763		10,205,443		25,167
Commercial real estate - income producing		1,540		3,731		5,676		10,947		2,500,861		2,511,808		2,907
Construction and land development		5,018		1,031		2,861		8,910		1,364,138		1,373,048		417
Residential mortgages		39,081		10,575		24,415		74,071		2,522,621		2,596,692		41
Consumer		15,574		7,426		7,710		30,710		2,068,584		2,099,294		318
Total	$	111,426	$	26,946	$	153,946	$	292,318	$	18,493,967	$	18,786,285	$	28,850

													Recorded
					Greater than								investment
	30-59 days		60-89 days		90 days		Total				Total		> 90 days and
December 31, 2016	past due		past due		past due		past due		Current		Loans		still accruing
(in thousands)
Commercial non-real estate	$	19,722	$	1,909	$	68,505	$	90,136	$	7,523,781	$	7,613,917	$	384
Commercial real estate - owner occupied		3,008		581		6,310		9,899		1,896,922		1,906,821		52
Total commercial & industrial		22,730		2,490		74,815		100,035		9,420,703		9,520,738		436
Commercial real estate - income producing		838		50		5,026		5,914		2,007,976		2,013,890		216
Construction and land development		694		171		5,300		6,165		1,004,714		1,010,879		1,563
Residential mortgages		24,599		8,816		14,369		47,784		2,098,929		2,146,713		1
Consumer		18,621		7,441		9,147		35,209		2,024,722		2,059,931		823
Total	$	67,482	$	18,968	$	108,657	$	195,107	$	16,557,044	$	16,752,151	$	3,039

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

	September 30, 2017				December 31, 2016
	Carrying				Carrying
	Amount		Accretable		Amount		Accretable
(in thousands)	of Loans		Yield		of Loans		Yield
Balance at beginning of period	$	190,915	$	113,686	$	225,838	$	129,488
Addition of cost recovery loans		23,431		—		—		—
Payments received, net		(51,040)		(6,651)		(55,194)		(11,024)
Accretion		12,805		(12,805)		20,271		(20,271)
Increase in expected cash flows based on actual cash flows and changes in cash flow assumptions		—		4,149		—		5,358
Net transfers from nonaccretable difference to accretable yield		—		8,095		—		10,135
Balance at end of period	$	176,111	$	106,474	$	190,915	$	113,686

Activity in Loss Share Receivable

	September 30,		September 30,
(in thousands)	2017		2016
Beginning Balance	$	16,219	$	29,868
Amortization		(2,427)		(4,678)
Charge-offs, write-downs and other recoveries		(2,442)		(5,569)
External expenses qualifying under loss share agreements		79		1,000
Adjustment due to changes in cash flow projections		(2,526)		(3,027)
Net payments to FDIC		934		436
Write-down for termination of loss share agreements		(6,603)		—
Cash received from FDIC for final settlement of agreements		(3,234)		—
Ending balance	$	—	$	18,030

Total Commercial [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Credit Quality Indicators by Segments and Portfolio Class

	September 30, 2017
(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	$	6,941,591	$	1,840,553	$	8,782,144	$	2,327,685	$	1,278,648	$	12,388,477
Pass-Watch		345,073		83,808		428,881		107,568		73,538		609,987
Special Mention		122,023		41,270		163,293		12,802		7,484		183,579
Substandard		717,436		110,383		827,819		63,744		13,378		904,941
Doubtful		3,306		—		3,306		9		—		3,315
Total	$	8,129,429	$	2,076,014	$	10,205,443	$	2,511,808	$	1,373,048	$	14,090,299
	December 31, 2016
(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	$	6,364,348	$	1,719,114	$	8,083,462	$	1,873,644	$	968,505	$	10,925,611
Pass-Watch		203,311		47,676		250,987		78,309		22,592		351,888
Special Mention		181,763		40,299		222,062		22,492		4,142		248,696
Substandard		846,793		99,732		946,525		39,434		15,640		1,001,599
Doubtful		17,702		—		17,702		11		—		17,713
Total	$	7,613,917	$	1,906,821	$	9,520,738	$	2,013,890	$	1,010,879	$	12,545,507

Residential Mortgage and Consumer [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Credit Quality Indicators by Segments and Portfolio Class

	September 30, 2017						December 31, 2016
(in thousands)	Residential mortgage		Consumer		Total		Residential mortgage		Consumer		Total
Performing	$	2,561,977	$	2,084,913	$	4,646,890	$	2,123,048	$	2,046,757	$	4,169,805
Nonperforming		34,715		14,381		49,096		23,665		13,174		36,839
Total	$	2,596,692	$	2,099,294	$	4,695,986	$	2,146,713	$	2,059,931	$	4,206,644