Loans and Leases (Tables)

3 Months Ended

Mar. 31, 2017

Loans and Leases Receivable Disclosure [Abstract]

Loans And Leases Outstanding

Loans and leases outstanding included the following at March 31, 2017 and December 31, 2016:

(Dollars in thousands)	March 31, 2017		December 31, 2016
Non-PCI loans and leases:
Commercial:
Construction and land development	$	683,415	$	649,157
Commercial mortgage	9,173,612		9,026,220
Other commercial real estate	364,862		351,291
Commercial and industrial	2,477,911		2,567,501
Lease financing	840,201		826,270
Other	321,352		340,264
Total commercial loans	13,861,353		13,760,703
Noncommercial:
Residential mortgage	2,945,361		2,889,124
Revolving mortgage	2,604,156		2,601,344
Construction and land development	218,103		231,400
Consumer	1,428,660		1,446,138
Total noncommercial loans	7,196,280		7,168,006
Total non-PCI loans and leases	21,057,633		20,928,709
PCI loans:
Commercial:
Construction and land development	26,542		20,766
Commercial mortgage	455,551		453,013
Other commercial real estate	18,723		12,645
Commercial and industrial	27,794		11,844
Other	1,244		1,702
Total commercial loans	529,854		499,970
Noncommercial:
Residential mortgage	275,904		268,777
Revolving mortgage	40,345		38,650
Consumer	2,713		1,772
Total noncommercial loans	318,962		309,199
Total PCI loans	848,816		809,169
Total loans and leases	$	21,906,449	$	21,737,878

Composition Of The Loans And Leases Outstanding By Credit Quality Indicator

Non-PCI loans and leases outstanding at March 31, 2017 and December 31, 2016 by credit quality indicator are provided below:

	March 31, 2017
(Dollars in thousands)	Non-PCI commercial loans and leases
Grade:	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	675,254	$	8,977,705	$	360,981	$	2,303,778	$	829,872	$	314,857	$	13,462,447
Special mention	2,144		72,007		592		23,335		3,560		1,006		102,644
Substandard	5,979		123,588		3,289		19,585		6,761		5,488		164,690
Doubtful	38		312		—		7		—		—		357
Ungraded	—		—		—		131,206		8		1		131,215
Total	$	683,415	$	9,173,612	$	364,862	$	2,477,911	$	840,201	$	321,352	$	13,861,353
	December 31, 2016
	Non-PCI commercial loans and leases
	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	645,232	$	8,821,439	$	347,509	$	2,402,659	$	818,008	$	335,831	$	13,370,678
Special mention	2,236		76,084		1,433		22,804		2,675		1,020		106,252
Substandard	1,683		126,863		2,349		17,870		5,415		3,413		157,593
Doubtful	6		334		—		8		—		—		348
Ungraded	—		1,500		—		124,160		172		—		125,832
Total	$	649,157	$	9,026,220	$	351,291	$	2,567,501	$	826,270	$	340,264	$	13,760,703

	March 31, 2017
	Non-PCI noncommercial loans and leases
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	2,899,295	$	2,582,739	$	215,112	$	1,418,899	$	7,116,045
30-59 days past due	27,662		11,702		610		5,661		45,635
60-89 days past due	3,885		3,162		1,378		2,214		10,639
90 days or greater past due	14,519		6,553		1,003		1,886		23,961
Total	$	2,945,361	$	2,604,156	$	218,103	$	1,428,660	$	7,196,280
	December 31, 2016
	Non-PCI noncommercial loans and leases
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	2,839,045	$	2,576,942	$	229,106	$	1,434,658	$	7,079,751
30-59 days past due	27,760		14,290		1,139		6,775		49,964
60-89 days past due	7,039		2,698		598		2,779		13,114
90 days or greater past due	15,280		7,414		557		1,926		25,177
Total	$	2,889,124	$	2,601,344	$	231,400	$	1,446,138	$	7,168,006

PCI loans outstanding at March 31, 2017 and December 31, 2016 by credit quality indicator are provided below:

	March 31, 2017
(Dollars in thousands)	PCI commercial loans
Grade:	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	11,129	$	243,473	$	14,896	$	18,204	$	642	$	288,344
Special mention	1,509		66,969		641		2,449		—		71,568
Substandard	10,776		131,350		2,516		2,901		602		148,145
Doubtful	3,128		13,759		670		4,215		—		21,772
Ungraded	—		—		—		25		—		25
Total	$	26,542	$	455,551	$	18,723	$	27,794	$	1,244	$	529,854
	December 31, 2016
	PCI commercial loans
	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	8,103	$	234,023	$	8,744	$	7,253	$	696	$	258,819
Special mention	950		67,848		102		620		—		69,520
Substandard	7,850		138,312		3,462		3,648		1,006		154,278
Doubtful	3,863		12,830		337		303		—		17,333
Ungraded	—		—		—		20		—		20
Total	$	20,766	$	453,013	$	12,645	$	11,844	$	1,702	$	499,970

	March 31, 2017
	PCI noncommercial loans
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Consumer		Total PCI noncommercial loans
Current	$	236,294	$	34,868	$	2,541	$	273,703
30-59 days past due	10,017		1,231		48		11,296
60-89 days past due	4,935		349		3		5,287
90 days or greater past due	24,658		3,897		121		28,676
Total	$	275,904	$	40,345	$	2,713	$	318,962
	December 31, 2016
	PCI noncommercial loans
	Residential mortgage		Revolving mortgage		Consumer		Total PCI noncommercial loans
Current	$	230,065	$	33,827	$	1,637	$	265,529
30-59 days past due	9,595		618		68		10,281
60-89 days past due	6,528		268		4		6,800
90 days or greater past due	22,589		3,937		63		26,589
Total	$	268,777	$	38,650	$	1,772	$	309,199

Aging Of The Outstanding Loans And Leases By Class Excluding Loans Impaired At Acquisition Date

The aging of the outstanding non-PCI loans and leases, by class, at March 31, 2017 and December 31, 2016 is provided in the table below.

The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.

	March 31, 2017
(Dollars in thousands)	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	3,897	$	2	$	102	$	4,001	$	679,414	$	683,415
Commercial mortgage	16,294		3,633		8,750		28,677		9,144,935		9,173,612
Other commercial real estate	181		172		530		883		363,979		364,862
Commercial and industrial	9,543		1,576		3,229		14,348		2,463,563		2,477,911
Lease financing	992		733		290		2,015		838,186		840,201
Residential mortgage	27,662		3,885		14,519		46,066		2,899,295		2,945,361
Revolving mortgage	11,702		3,162		6,553		21,417		2,582,739		2,604,156
Construction and land development - noncommercial	610		1,378		1,003		2,991		215,112		218,103
Consumer	5,661		2,214		1,886		9,761		1,418,899		1,428,660
Other	194		—		161		355		320,997		321,352
Total non-PCI loans and leases	$	76,736	$	16,755	$	37,023	$	130,514	$	20,927,119	$	21,057,633
	December 31, 2016
	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	1,845	$	39	$	286	$	2,170	$	646,987	$	649,157
Commercial mortgage	11,592		2,773		10,329		24,694		9,001,526		9,026,220
Other commercial real estate	310		—		—		310		350,981		351,291
Commercial and industrial	7,918		2,102		1,051		11,071		2,556,430		2,567,501
Lease financing	1,175		444		863		2,482		823,788		826,270
Residential mortgage	27,760		7,039		15,280		50,079		2,839,045		2,889,124
Revolving mortgage	14,290		2,698		7,414		24,402		2,576,942		2,601,344
Construction and land development - noncommercial	1,139		598		557		2,294		229,106		231,400
Consumer	6,775		2,779		1,926		11,480		1,434,658		1,446,138
Other	72		—		198		270		339,994		340,264
Total non-PCI loans and leases	$	72,876	$	18,472	$	37,904	$	129,252	$	20,799,457	$	20,928,709

Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing

The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2017 and December 31, 2016 for non-PCI loans and leases, were as follows:

	March 31, 2017				December 31, 2016
(Dollars in thousands)	Nonaccrual loans and leases		Loans and leases > 90 days and accruing		Nonaccrual loans and leases		Loans and leases > 90 days and accruing
Non-PCI loans and leases:
Construction and land development - commercial	$	778	$	—	$	606	$	—
Commercial mortgage	25,709		962		26,527		482
Other commercial real estate	687		—		86		—
Commercial and industrial	4,023		584		4,275		440
Lease financing	1,281		—		359		683
Residential mortgage	36,257		191		32,470		37
Revolving mortgage	13,931		—		14,308		—
Construction and land development - noncommercial	1,315		—		1,121		—
Consumer	1,830		1,245		2,236		1,076
Other	275		—		319		—
Total non-PCI loans and leases	$	86,086	$	2,982	$	82,307	$	2,718

Schedule of Contractually Required Payments Including Principal and Interest Expected Cash Flows to be Collected and Fair Values [Table Text Block]

The following table relates to PCI loans acquired in the HCB acquisition and summarizes the contractually required payments, which include principal and interest, expected cash flows to be collected, and the fair value of PCI loans at the acquisition date.

(Dollars in thousands)
Contractually required payments	$	111,250
Cash flows expected to be collected	101,802
Fair value of loans at acquisition	85,149

Changes In Carrying Value Of PCI Loans

The recorded fair values of PCI loans acquired in the HCB acquisition as of the acquisition date were as follows:

(Dollars in thousands)
Commercial:
Construction and land development	$	7,061
Commercial mortgage	21,836
Other commercial real estate	6,404
Commercial and industrial	19,675
Total commercial loans	54,976
Noncommercial:
Residential mortgage	25,857
Revolving mortgage	3,434
Consumer	882
Total noncommercial loans	30,173
Total PCI loans	$	85,149

The following table provides changes in the carrying value of all purchased credit-impaired loans during the three months ended March 31, 2017 and March 31, 2016:

(Dollars in thousands)	2017			2016
Balance at January 1	$	809,169		$	950,516
Fair value of acquired loans	85,149			35,416
Accretion	19,351			21,398
Payments received and other changes, net	(64,853		)	(61,443		)
Balance at March 31	$	848,816		$	945,887
Unpaid principal balance at March 31	$	1,155,034		$	1,665,896

Changes in Carrying Value of Accretable Yield for PCI Loans

The following table documents changes to the amount of accretable yield for the first three months of 2017 and 2016.

(Dollars in thousands)	2017			2016
Balance at January 1	$	335,074		$	343,856
Additions from acquisitions	16,653			6,176
Accretion	(19,351		)	(21,398		)
Reclassifications from nonaccretable difference	11,277			9,905
Changes in expected cash flows that do not affect nonaccretable difference	(2,179		)	4,418
Balance at March 31	$	341,474		$	342,957