Loans (Tables)

12 Months Ended

Dec. 31, 2016

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

Loans, Net of Unearned Income

	December 31,
(in thousands)	2016		2015
Commercial non-real estate	$	7,613,917	$	6,995,824
Commercial real estate - owner occupied		1,906,821		1,859,469
Total commercial & industrial		9,520,738		8,855,293
Commercial real estate - income producing		2,013,890		1,553,082
Construction and land development		1,010,879		1,151,950
Residential mortgages		2,146,713		2,049,524
Consumer		2,059,931		2,093,465
Total loans	$	16,752,151	$	15,703,314

Allowance for Loan Losses by Portfolio Class

	Commercial non-real estate		Commercial real estate- owner occupied		Total commercial & industrial		Commercial real estate- income producing		Construction and land development		Residential mortgages		Consumer		Total
(in thousands)	Year Ended December 31, 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)		(323)		(8)		(378)
Recoveries		115		269		384		2		361		36		189		972
Net provision for loan losses		(44)		(440)		(484)		(462)		(594)		1,876		(1,740)		(1,404)
(Decrease) increase in FDIC loss share receivable		(31)		—		(31)		—		—		(4,209)		283		(3,957)
Non-purchased credit impaired activity:
Charge-offs		(42,620)		(1,819)		(44,439)		(346)		(964)		(1,040)		(26,099)		(72,888)
Recoveries		3,969		480		4,449		989		1,725		859		5,809		13,831
Net provision for loan losses		76,235		2,763		78,998		7,286		119		2,809		22,851		112,063
Ending balance	$	147,052	$	11,083	$	158,135	$	13,509	$	6,271	$	25,361	$	26,142	$	229,418
Ending balance:
Allowance:
Individually evaluated for impairment	$	28,187	$	246	$	28,433	$	466	$	38	$	91	$	267	$	29,295
Amounts related to purchased credit impaired loans		486		894		1,380		253		406		15,043		1,271		18,353
Collectively evaluated for impairment		118,379		9,943		128,322		12,790		5,827		10,227		24,604		181,770
Total allowance	$	147,052	$	11,083	$	158,135	$	13,509	$	6,271	$	25,361	$	26,142	$	229,418
Loans:
Individually evaluated for impairment	$	271,262	$	6,268	$	277,530	$	15,376	$	1,938	$	4,347	$	2,154	$	301,345
Purchased credit impaired loans		11,368		13,323		24,691		7,928		5,271		141,992		11,033		190,915
Collectively evaluated for impairment		7,331,287		1,887,230		9,218,517		1,990,586		1,003,670		2,000,374		2,046,744		16,259,891
Total loans	$	7,613,917	$	1,906,821	$	9,520,738	$	2,013,890	$	1,010,879	$	2,146,713	$	2,059,931	$	16,752,151

	Commercial non-real estate		Commercial real estate- owner occupied		Total commercial & industrial		Commercial real estate- income producing		Construction and land development		Residential mortgages		Consumer		Total
(in thousands)	Year Ended December 31, 2015
Allowance for loan  losses:
Beginning balance	$	51,169	$	13,536	$	64,705	$	7,546	$	6,421	$	28,660	$	21,430	$	128,762
Purchased credit impaired activity
Charge-offs		(1,427)		(390)		(1,817)		(2,353)		(410)		(772)		(143)		(5,495)
Recoveries		1,704		971		2,675		21		910		84		196		3,886
Net provision for loan losses		(1,018)		(1,848)		(2,866)		822		(845)		1,147		(1,313)		(3,055)
Increase (decrease) in FDIC loss share receivable		276		(396)		(120)		919		(6)		(3,405)		(188)		(2,800)
Non-purchased credit impaired activity:
Charge-offs		(6,934)		(1,002)		(7,936)		(480)		(2,424)		(1,635)		(16,688)		(29,163)
Recoveries		3,342		1,663		5,005		742		2,179		687		4,338		12,951
Net provision for loan losses		62,316		(2,676)		59,640		(1,176)		(183)		587		17,225		76,093
Ending balance	$	109,428	$	9,858	$	119,286	$	6,041	$	5,642	$	25,353	$	24,857	$	181,179
Ending balance:
Allowance:
Individually evaluated for impairment	$	19,031	$	23	$	19,054	$	1,382	$	392	$	127	$	33	$	20,988
Amounts related to purchased credit impaired loans		446		1,093		1,539		714		657		17,663		2,547		23,120
Collectively evaluated for impairment		89,951		8,742		98,693		3,945		4,593		7,563		22,277		137,071
Total allowance	$	109,428	$	9,858	$	119,286	$	6,041	$	5,642	$	25,353	$	24,857	$	181,179
Loans:
Individually evaluated for impairment	$	81,622	$	5,409	$	87,031	$	11,122	$	14,226	$	895	$	152	$	113,426
Purchased credit impaired loans		12,004		17,431		29,435		9,193		12,103		162,268		12,839		225,838
Collectively evaluated for impairment		6,902,198		1,836,629		8,738,827		1,532,767		1,125,621		1,886,361		2,080,474		15,364,050
Total loans	$	6,995,824	$	1,859,469	$	8,855,293	$	1,553,082	$	1,151,950	$	2,049,524	$	2,093,465	$	15,703,314

Composition of Nonaccrual Loans by Portfolio Class

	December 31,
(in thousands)	2016		2015
Commercial non-real estate	$	249,037	$	88,743
Commercial real estate - owner occupied		14,413		10,001
Total commercial & industrial		263,450		98,744
Commercial real estate - income producing		13,954		10,815
Construction and land development		4,550		17,294
Residential mortgages		23,665		23,799
Consumer		12,351		9,061
Total loans	$	317,970	$	159,713

Troubled Debt Restructurings Modified by Portfolio Class

	Years Ended
($ in thousands)	2016					2015
		Outstanding Recorded Investment					Outstanding Recorded Investment
Troubled Debt Restructurings:	Number of Contracts	Pre- Modification		Post- Modification		Number of Contracts	Pre- Modification		Post- Modification
Commercial non-real estate	38	$	128,449	$	128,449	1	$	4,420	$	4,420
Commercial real estate - owner occupied	1		148		148	—		—		—
Total commercial & industrial	39		128,597		128,597	1		4,420		4,420
Commercial real estate - income producing	1		2,943		2,943	1		485		482
Construction and land development	—		—		—	—		—		—
Residential mortgages	7		694		694	4		195		185
Consumer	—		—		—	1		20		20
Total loans	47	$	132,234	$	132,234	7	$	5,120	$	5,107

Loans Individually Evaluated for Impairment Disaggregated by Portfolio Class

	December 31, 2016
(in thousands)	Recorded investment without an allowance		Recorded investment with an allowance		Unpaid 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

	December 31, 2015
(in thousands)	Recorded investment without an allowance		Recorded investment with an allowance		Unpaid principal balance		Related allowance
Commercial non-real estate	$	34,788	$	46,834	$	84,988	$	19,031
Commercial real estate - owner occupied		4,747		661		5,931		23
Total commercial & industrial		39,535		47,495		90,919		19,054
Commercial real estate - income producing		3,038		8,085		11,363		1,382
Construction and land development		12,461		1,765		14,784		392
Residential mortgages		—		895		1,405		127
Consumer		—		152		152		33
Total loans	$	55,034	$	58,392	$	118,623	$	20,988

	Years Ended
	December 31, 2016				December 31, 2015
(in thousands)	Average Recorded Investment		Interest income recognized		Average Recorded Investment		Interest income recognized
Commercial non-real estate	$	211,324	$	1,164	$	41,274	$	11
Commercial real estate - owner occupied		6,151		44		14,269		54
Total commercial & industrial		217,475		1,208		55,543		65
Commercial real estate - income producing		9,347		106		11,396		85
Construction and land development		6,366		1		5,508		66
Residential mortgages		2,109		10		1,618		22
Consumer		716		5		119		4
Total loans	$	236,013	$	1,330	$	74,184	$	242

Age Analysis of Past Due Loans by Portfolio Class

December 31, 2016	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	$	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 loans	$	67,482	$	18,968	$	108,657	$	195,107	$	16,557,044	$	16,752,151	$	3,039

December 31, 2015	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	$	17,406	$	1,468	$	25,007	$	43,881	$	6,951,943	$	6,995,824	$	3,060
Commercial real estate - owner occupied		5,898		802		6,646		13,346		1,846,123		1,859,469		535
Total commercial & industrial		23,304		2,270		31,653		57,227		8,798,066		8,855,293		3,595
Commercial real estate - income producing		871		603		6,382		7,856		1,545,226		1,553,082		499
Construction and land development		19,886		436		4,043		24,365		1,127,585		1,151,950		1,230
Residential mortgages		18,657		4,360		11,840		34,857		2,014,667		2,049,524		163
Consumer		16,309		4,432		8,645		29,386		2,064,079		2,093,465		2,166
Total loans	$	79,027	$	12,101	$	62,563	$	153,691	$	15,549,623	$	15,703,314	$	7,653

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

	Years Ended
		December 31, 2016				December 31, 2015
		Carrying				Carrying
		Amount		Accretable		Amount		Accretable
(in thousands)		of Loans		Yield		of Loans		Yield
Balance at beginning of period		$	225,838	$	129,488	$	313,685	$	187,456
Payments received, net			(55,194)		(11,024)		(115,847)		(21,978)
Accretion			20,271		(20,271)		28,000		(28,000)
Increase (decrease) in expected cash flows based on actual
cash flow and changes in cash flow assumptions			—		5,358		—		(4,238)
Net transfers from nonaccretable difference
to accretable yield			—		10,135		—		(3,752)
Balance at end of period		$	190,915	$	113,686	$	225,838	$	129,488

Activity in Loss Share Receivable

	Years Ended December 31,
(in thousands)	2016		2015
Balance, January 1	$	29,868	$	60,272
Amortization		(5,918)		(5,747)
Charge-offs, write-downs and other (recoveries) losses		(8,264)		(8,072)
External expenses qualifying under loss share agreement		1,356		2,677
Changes due to changes in cash flow projections		(3,957)		(2,800)
FDIC resolution of denied claims		—		(2,411)
Net payments to (from) FDIC		3,134		(14,051)
Balance, December 31	$	16,219	$	29,868

Total Commercial [Member]

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

Credit Quality Indicators by Segments and Portfolio Class

	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

	December 31, 2015
(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	$	6,260,863	$	1,718,725	$	7,979,588	$	1,502,484	$	1,095,296	$	10,577,368
Pass-Watch		168,589		31,764		200,353		14,717		6,841		221,911
Special Mention		211,230		41,147		252,377		5,905		12,297		270,579
Substandard		355,098		67,833		422,931		29,960		37,516		490,407
Doubtful		44		—		44		16		—		60
Total	$	6,995,824	$	1,859,469	$	8,855,293	$	1,553,082	$	1,151,950	$	11,560,325

Residential Mortgage and Consumer [Member]

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

Credit Quality Indicators by Segments and Portfolio Class

	December 31, 2016						December 31, 2015
(in thousands)	Residential mortgage		Consumer		Total		Residential mortgage		Consumer		Total
Performing	$	2,123,048	$	2,046,757	$	4,169,805	$	2,025,563	$	2,082,238	$	4,107,801
Nonperforming		23,665		13,174		36,839		23,961		11,227		35,188
Total	$	2,146,713	$	2,059,931	$	4,206,644	$	2,049,524	$	2,093,465	$	4,142,989