Loans and Allowance for Loan Losses (Tables)

6 Months Ended

Jun. 30, 2017

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

Loans, Net of Unearned Income

	June 30,		December 31,
(in thousands)	2017		2016
Commercial non-real estate	$	8,093,104	$	7,613,917
Commercial real estate - owner occupied		2,078,332		1,906,821
Total commercial & industrial		10,171,436		9,520,738
Commercial real estate - income producing		2,401,673		2,013,890
Construction and land development		1,313,522		1,010,879
Residential mortgages		2,493,923		2,146,713
Consumer		2,093,287		2,059,931
Total loans	$	18,473,841	$	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
	Six months ended June 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		—		—		—		—		(58)		(86)		(153)		(297)
Recoveries		2		93		95		—		39		19		71		224
Net provision for loan losses		(46)		(245)		(291)		(61)		(148)		(10)		(112)		(622)
Decrease in FDIC loss share receivable		(47)		—		(47)		—		—		(2,344)		(135)		(2,526)
Non-purchased credit impaired activity:
Charge-offs		(26,218)		(517)		(26,735)		(160)		(114)		(690)		(15,107)		(42,806)
Recoveries		1,816		243		2,059		398		716		262		3,475		6,910
Net provision for loan losses		14,804		1,441		16,245		(146)		343		868		14,254		31,564
Ending balance	$	137,363	$	12,098	$	149,461	$	13,540	$	7,049	$	23,380	$	28,435	$	221,865
Ending balance:
Allowance:
Individually evaluated for impairment	$	22,758	$	280	$	23,038	$	1,402	$	1	$	172	$	283	$	24,896
Amounts related to purchased credit impaired loans		395		742		1,137		192		239		12,622		942		15,132
Collectively evaluated for impairment		114,210		11,076		125,286		11,946		6,809		10,586		27,210		181,837
Total allowance	$	137,363	$	12,098	$	149,461	$	13,540	$	7,049	$	23,380	$	28,435	$	221,865
Loans:
Individually evaluated for impairment	$	250,256	$	7,480	$	257,736	$	14,913	$	847	$	3,466	$	1,053	$	278,015
Purchased credit impaired loans		5,422		9,848		15,270		6,247		4,160		129,198		8,280		163,155
Collectively evaluated for impairment		7,837,426		2,061,004		9,898,430		2,380,513		1,308,515		2,361,259		2,083,954		18,032,671
Total loans	$	8,093,104	$	2,078,332	$	10,171,436	$	2,401,673	$	1,313,522	$	2,493,923	$	2,093,287	$	18,473,841

			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
	Six months ended June 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)		(23)		(8)		(78)
Recoveries		8		120		128		2		53		3		106		292
Net provision for loan losses		79		(170)		(91)		26		(117)		1,165		(1,290)		(307)
Decrease in FDIC loss share receivable		39		—		39		—		—		(3,378)		(98)		(3,437)
Non-purchased credit impaired activity:
Charge-offs		(22,212)		(1,199)		(23,411)		(191)		(592)		(592)		(11,268)		(36,054)
Recoveries		1,802		238		2,040		268		1,125		480		3,039		6,952
Net provision for loan losses		61,628		1,857		63,485		6,654		(1,087)		466		8,021		77,539
Ending balance	$	150,772	$	10,676	$	161,448	$	12,799	$	5,006	$	23,474	$	23,359	$	226,086
Ending balance:
Allowance:
Individually evaluated for impairment	$	12,885	$	183	$	13,068	$	72	$	1	$	167	$	41	$	13,349
Amounts related to purchased credit impaired loans		572		1,015		1,587		741		575		15,430		1,257		19,590
Collectively evaluated for impairment		137,315		9,478		146,793		11,986		4,430		7,877		22,061		193,147
Total allowance	$	150,772	$	10,676	$	161,448	$	12,799	$	5,006	$	23,474	$	23,359	$	226,086
Loans:
Individually evaluated for impairment	$	232,785	$	5,898	$	238,683	$	7,803	$	1,247	$	1,068	$	166	$	248,967
Purchased credit impaired loans		10,483		15,428		25,911		10,752		8,761		151,674		12,826		209,924
Collectively evaluated for impairment		6,889,251		1,894,874		8,784,125		2,005,916		870,580		1,864,908		2,051,376		15,576,905
Total loans	$	7,132,519	$	1,916,200	$	9,048,719	$	2,024,471	$	880,588	$	2,017,650	$	2,064,368	$	16,035,796

Composition of Nonaccrual Loans by Portfolio Class

	June 30,		December 31,
(in thousands)	2017		2016
Commercial non-real estate	$	167,710	$	249,037
Commercial real estate - owner occupied		11,750		14,413
Total commercial & industrial		179,460		263,450
Commercial real estate - income producing		13,438		13,954
Construction and land development		2,821		4,550
Residential mortgages		28,158		23,665
Consumer		14,342		12,351
Total loans	$	238,219	$	317,970

Troubled Debt Restructurings Modified by Portfolio Class

	Six months ended
($ in thousands)		June 30, 2017						June 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		37	$	92,976	$	92,976		17	$	57,915	$	57,915
Commercial real estate - owner occupied		4		3,734		3,734		—		—		—
Total commercial & industrial		41		96,710		96,710		17		57,915		57,915
Commercial real estate - income producing		5		6,486		6,486		—		—		—
Construction and land development		—		—		—		—		—		—
Residential mortgages		6		1,098		1,098		4		432		432
Consumer		1		40		42		—		—		—
Total loans		53	$	104,334	$	104,336		21	$	58,347	$	58,347

Loans Individually Evaluated for Impairment Disaggregated by Portfolio Class

	June 30, 2017
		Recorded investment		Recorded investment		Unpaid
(in thousands)		without an allowance		with an allowance		principal balance		Related allowance
Commercial non-real estate	$	107,555	$	142,701	$	260,544	$	22,758
Commercial real estate - owner occupied		3,514		3,966		7,570		280
Total commercial & industrial		111,069		146,667		268,114		23,038
Commercial real estate - income producing		5,678		9,235		15,349		1,402
Construction and land development		831		16		1,820		1
Residential mortgages		2,338		1,128		3,984		172
Consumer		1		1,052		1,055		283
Total loans	$	119,917	$	158,098	$	290,322	$	24,896
	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 six months ended June 30, 2017 and 2016.  Interest income recognized represents interest on accruing loans modified in a TDR.

	Three months ended
	June 30, 2017				June 30, 2016
	Average		Interest		Average			Interest
	recorded		income		recorded			income
(in thousands)	investment		recognized		investment			recognized
Commercial non-real estate	$	241,122	$	597	$	216,907	$	493
Commercial real estate - owner occupied		5,687		18		5,959		14
Total commercial & industrial		246,809		615		222,866		507
Commercial real estate - income producing		14,257		34		8,242		22
Construction and land development		1,219		—		7,660		—
Residential mortgages		3,352		3		976		2
Consumer		1,601		3		112		1
Total loans	$	267,238	$	655	$	239,856	$	532

	Six months ended
	June 30, 2017				June 30, 2016
	Average		Interest		Average			Interest
	recorded		income		recorded			income
(in thousands)	investment		recognized		investment			recognized
Commercial non-real estate	$	246,374	$	934	$	179,117	$	847
Commercial real estate - owner occupied		5,384		22		5,836		29
Total commercial & industrial		251,758		956		184,953		876
Commercial real estate - income producing		14,372		77		9,072		43
Construction and land development		1,492		—		10,905		—
Residential mortgages		3,572		5		932		4
Consumer		1,876		5		109		2
Total loans	$	273,070	$	1,043	$	205,971	$	925

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
June 30, 2017	past due		past due		past due		past due		Current		Loans		still accruing
(in thousands)
Commercial non-real estate	$	27,751	$	27,974	$	91,987	$	147,712	$	7,945,392	$	8,093,104	$	13,088
Commercial real estate - owner occupied		4,532		1,189		6,321		12,042		2,066,290		2,078,332		424
Total commercial & industrial		32,283		29,163		98,308		159,754		10,011,682		10,171,436		13,512
Commercial real estate - income producing		3,369		2,319		5,040		10,728		2,390,945		2,401,673		1,989
Construction and land development		6,250		619		1,980		8,849		1,304,673		1,313,522		—
Residential mortgages		25,433		12,208		22,088		59,729		2,434,194		2,493,923		2,801
Consumer		15,764		5,843		7,600		29,207		2,064,080		2,093,287		88
Total	$	83,099	$	50,152	$	135,016	$	268,267	$	18,205,574	$	18,473,841	$	18,390

													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

	June 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
Payments received, net		(36,950)		(6,258)		(55,194)		(11,024)
Accretion		9,190		(9,190)		20,271		(20,271)
Increase in expected cash flows based on actual cash flows and changes in cash flow assumptions		—		4,405		—		5,358
Net transfers from nonaccretable difference to accretable yield		—		5,183		—		10,135
Balance at end of period	$	163,155	$	107,826	$	190,915	$	113,686

Activity in Loss Share Receivable

	June 30,		June 30,
(in thousands)	2017		2016
Beginning Balance	$	16,219	$	29,868
Amortization		(2,427)		(3,139)
Charge-offs, write-downs and other recoveries		(2,442)		(2,683)
External expenses qualifying under loss share agreement		79		307
Adjustment due to changes in cash flow projections		(2,526)		(3,437)
Net payments to FDIC		934		159
Write-down for termination of loss share agreement		(6,603)		—
Ending balance	$	3,234	$	21,075

Total Commercial [Member]

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

Credit Quality Indicators by Segments and Portfolio Class

	June 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	$	6,897,989	$	1,859,185	$	8,757,174	$	2,214,329	$	1,233,082	$	12,204,585
Pass-Watch		298,254		55,146		353,400		117,247		58,024		528,671
Special Mention		215,373		43,219		258,592		13,840		7,591		280,023
Substandard		678,032		120,782		798,814		56,247		14,825		869,886
Doubtful		3,456		—		3,456		10		—		3,466
Loss		—		—		—		—		—		—
Total	$	8,093,104	$	2,078,332	$	10,171,436	$	2,401,673	$	1,313,522	$	13,886,631
	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
Loss		—		—		—		—		—		—
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

	June 30, 2017						December 31, 2016
(in thousands)	Residential mortgage		Consumer		Total		Residential mortgage		Consumer		Total
Performing	$	2,462,964	$	2,078,857	$	4,541,821	$	2,123,048	$	2,046,757	$	4,169,805
Nonperforming		30,959		14,430		45,389		23,665		13,174		36,839
Total	$	2,493,923	$	2,093,287	$	4,587,210	$	2,146,713	$	2,059,931	$	4,206,644