Loans and Leases (Tables)

6 Months Ended

Jun. 30, 2018

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]

Loans And Leases Outstanding

Loans and leases outstanding included the following at June 30, 2018 and December 31, 2017:

(Dollars in thousands)	June 30, 2018		December 31, 2017
Non-PCI loans and leases:
Commercial:
Construction and land development	$	715,011	$	669,215
Commercial mortgage	10,278,741		9,729,022
Other commercial real estate	473,452		473,433
Commercial and industrial	3,097,541		2,730,407
Lease financing	613,377		894,801
Other	296,614		302,176
Total commercial loans	15,474,736		14,799,054
Noncommercial:
Residential mortgage	3,980,845		3,523,786
Revolving mortgage	2,604,955		2,701,525
Construction and land development	250,704		248,289
Consumer	1,552,928		1,561,173
Total noncommercial loans	8,389,432		8,034,773
Total non-PCI loans and leases	23,864,168		22,833,827
PCI loans:
Total PCI loans	674,269		762,998
Total loans and leases	$	24,538,437	$	23,596,825

Composition Of The Loans And Leases Outstanding By Credit Quality Indicator

Non-PCI loans and leases outstanding at June 30, 2018 and December 31, 2017 by credit quality indicator are provided below:

	June 30, 2018
(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	$	703,034	$	10,083,382	$	470,236	$	2,868,180	$	603,760	$	293,804	$	15,022,396
Special mention	352		88,157		1,159		35,636		3,916		1,258		130,478
Substandard	3,195		105,647		2,057		21,265		5,701		1,552		139,417
Doubtful	—		999		—		365		—		—		1,364
Ungraded	8,430		556		—		172,095		—		—		181,081
Total	$	715,011	$	10,278,741	$	473,452	$	3,097,541	$	613,377	$	296,614	$	15,474,736
	December 31, 2017
	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	$	665,197	$	9,521,019	$	468,942	$	2,511,307	$	883,779	$	298,064	$	14,348,308
Special mention	691		78,643		1,260		44,130		4,340		2,919		131,983
Substandard	3,327		128,848		3,224		18,617		6,585		1,193		161,794
Doubtful	—		262		—		385		—		—		647
Ungraded	—		250		7		155,968		97		—		156,322
Total	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	14,799,054

	June 30, 2018
	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	$	3,936,065	$	2,581,818	$	248,343	$	1,541,465	$	8,307,691
30-59 days past due	21,032		9,864		1,839		6,013		38,748
60-89 days past due	6,291		3,367		51		2,729		12,438
90 days or greater past due	17,457		9,906		471		2,721		30,555
Total	$	3,980,845	$	2,604,955	$	250,704	$	1,552,928	$	8,389,432
	December 31, 2017
	Non-PCI noncommercial loans and leases
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,465,935	$	2,674,390	$	239,648	$	1,546,473	$	7,926,446
30-59 days past due	27,886		13,428		7,154		8,812		57,280
60-89 days past due	8,064		3,485		108		2,893		14,550
90 days or greater past due	21,901		10,222		1,379		2,995		36,497
Total	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	8,034,773

PCI loans outstanding at June 30, 2018 and December 31, 2017 by credit quality indicator are provided below:

	June 30, 2018		December 31, 2017
(Dollars in thousands)	PCI commercial loans
Grade:
Pass	$	165,578	$	201,332
Special mention	58,024		63,257
Substandard	105,937		117,068
Doubtful	6,536		11,735
Ungraded	34		27
Total	$	336,109	$	393,419

	June 30, 2018		December 31, 2017
	PCI noncommercial loans
(Dollars in thousands)
Current	$	299,579	$	318,632
30-59 days past due	12,146		13,343
60-89 days past due	4,167		6,212
90 days or greater past due	22,268		31,392
Total	$	338,160	$	369,579

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 June 30, 2018 and December 31, 2017 are provided in the tables below. 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.

	June 30, 2018
(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	$	466	$	264	$	132	$	862	$	714,149	$	715,011
Commercial mortgage	10,120		5,021		5,599		20,740		10,258,001		10,278,741
Other commercial real estate	1,568		—		18		1,586		471,866		473,452
Commercial and industrial	6,445		3,743		1,155		11,343		3,086,198		3,097,541
Lease financing	3,062		1,167		951		5,180		608,197		613,377
Residential mortgage	21,032		6,291		17,457		44,780		3,936,065		3,980,845
Revolving mortgage	9,864		3,367		9,906		23,137		2,581,818		2,604,955
Construction and land development - noncommercial	1,839		51		471		2,361		248,343		250,704
Consumer	6,013		2,729		2,721		11,463		1,541,465		1,552,928
Other	42		17		—		59		296,555		296,614
Total non-PCI loans and leases	$	60,451	$	22,650	$	38,410	$	121,511	$	23,742,657	$	23,864,168
	December 31, 2017
	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	$	491	$	442	$	357	$	1,290	$	667,925	$	669,215
Commercial mortgage	12,288		2,375		6,490		21,153		9,707,869		9,729,022
Other commercial real estate	107		—		75		182		473,251		473,433
Commercial and industrial	6,694		1,510		1,266		9,470		2,720,937		2,730,407
Lease financing	2,983		167		973		4,123		890,678		894,801
Residential mortgage	27,886		8,064		21,901		57,851		3,465,935		3,523,786
Revolving mortgage	13,428		3,485		10,222		27,135		2,674,390		2,701,525
Construction and land development - noncommercial	7,154		108		1,379		8,641		239,648		248,289
Consumer	8,812		2,893		2,995		14,700		1,546,473		1,561,173
Other	188		6		133		327		301,849		302,176
Total non-PCI loans and leases	$	80,031	$	19,050	$	45,791	$	144,872	$	22,688,955	$	22,833,827

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 June 30, 2018 and December 31, 2017 for non-PCI loans and leases, were as follows:

	June 30, 2018				December 31, 2017
(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	$	420	$	—	$	1,040	$	—
Commercial mortgage	18,457		839		22,625		397
Other commercial real estate	103		—		916		—
Commercial and industrial	3,168		319		2,884		428
Lease financing	1,755		—		1,992		—
Residential mortgage	35,173		—		38,942		—
Revolving mortgage	22,500		—		19,990		—
Construction and land development - noncommercial	1,012		—		1,989		—
Consumer	2,390		2,021		1,992		2,153
Other	77		—		164		—
Total non-PCI loans and leases	$	85,055	$	3,179	$	92,534	$	2,978

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 HomeBancorp transaction 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	$	26,651
Cash flows expected to be collected	$	19,697
Fair value of loans at acquisition	$	15,555

Changes In Carrying Value Of PCI Loans

The recorded fair values of PCI loans acquired in the HomeBancorp transaction as of the acquisition date are as follows:

(Dollars in thousands)
Commercial:
Commercial mortgage	$	7,815
Commercial and industrial	423
Total commercial loans	8,238
Noncommercial:
Residential mortgage	7,317
Total noncommercial loans	7,317
Total PCI loans	$	15,555

The following table provides changes in the carrying value of all PCI loans during the six months ended June 30, 2018 and June 30, 2017:

(Dollars in thousands)	2018			2017
Balance at January 1	$	762,998		$	809,169
Fair value of acquired loans	15,555			199,682
Accretion	32,188			39,798
Payments received and other changes, net	(136,472		)	(153,786		)
Balance at June 30	$	674,269		$	894,863
Unpaid principal balance at June 30	$	1,044,148		$	1,199,358

Changes in Carrying Value of Accretable Yield for PCI Loans

The following table documents changes to the amount of accretable yield for the first six months of 2018 and 2017.

(Dollars in thousands)	2018			2017
Balance at January 1	$	316,679		$	335,074
Additions from acquisitions	4,142			44,120
Accretion	(32,188		)	(39,798		)
Reclassifications from nonaccretable difference	6,899			12,328
Changes in expected cash flows that do not affect nonaccretable difference	48,988			(1,405		)
Balance at June 30	$	344,520		$	350,319

Changes In Carrying Value of Accretable Yield for PCI Loans

The following table relates to purchased non-PCI loans acquired in the HomeBancorp transaction and provides the contractually required payments, estimate of contractual cash flows not expected to be collected and fair value of the acquired loans at the acquisition date.

(Dollars in thousands)
Contractually required payments	$	710,876
Contractual cash flows not expected to be collected	$	9,845
Fair value at acquisition date	$	550,618

The recorded fair values of purchased non-PCI loans acquired in the HomeBancorp transaction as of the acquisition date are as follows:

(Dollars in thousands)
Commercial:
Construction and land development	$	525
Commercial mortgage	188,688
Other commercial real estate	55,183
Commercial and industrial	7,931
Total commercial loans	252,327
Noncommercial:
Residential mortgage	296,273
Revolving mortgage	51
Consumer	1,967
Total noncommercial loans	298,291
Total non-PCI loans	$	550,618