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Loans and Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2018

Accounts Notes And Loans Receivable [Line Items]

Summary of Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable

The following table presents total loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017, respectively. Outstanding balances include originated loans, Acquired Noncredit Impaired (“ANCI”) loans and Acquired Credit Impaired (“ACI”) loans. Information about ACI loans is presented separately in the “Acquired Credit-Impaired Loans” section of this Note.

	As of
(In thousands)	December 31, 2018			December 31, 2017
Commercial and Industrial
General C&I	$	3,275,362		$	2,746,454
Energy sector		1,285,775			935,371
Restaurant industry		1,096,366			1,035,538
Healthcare		539,839			416,423
Total commercial and industrial		6,197,342			5,133,786
Commercial Real Estate
Income producing		1,266,791			1,082,929
Land and development		63,948			75,472
Total commercial real estate		1,330,739			1,158,401
Consumer
Residential real estate		2,227,653			1,690,814
Other		67,100			74,922
Total consumer		2,294,753			1,765,736
Small Business Lending		266,283			221,855
Total (Gross of unearned discount and fees)		10,089,117			8,279,778
Unearned discount and fees		(35,194	)		(26,351	)
Total (Net of unearned discount and fees)	$	10,053,923		$	8,253,427

Summary of Allowance for Credit Losses

A summary of the activity in the ACL for each of the three years in the period ended December 31, 2018 is as follows:

	For the Year Ended December 31, 2018
(In thousands)	Commercial and Industrial			Commercial Real Estate			Consumer			Small Business			Total
As of December 31, 2017	$	55,919		$	11,990		$	14,983		$	4,684		$	87,576
Provision for loan losses		15,708			(1,837	)		(900	)		(271	)		12,700
Charge-offs		(6,709	)		(2	)		(716	)		(618	)		(8,045	)
Recoveries		1,398			301			336			112			2,147
As of December 31, 2018	$	66,316		$	10,452		$	13,703		$	3,907		$	94,378

Allocation of ending ACL
ACI loans collectively evaluated for impairment	$	58		$	1,641		$	6,018		$	—		$	7,717
ACI loans individually evaluated for impairment		—			—			207			—			207
ANCI loans collectively evaluated for impairment		293			53			535			58			939
ANCI loans individually evaluated for impairment		—			—			6			107			113
Originated loans collectively evaluated for impairment		58,665			8,758			6,918			3,742			78,083
Originated loans individually evaluated for impairment		7,300			—			19			—			7,319
ACL as of December 31, 2018	$	66,316		$	10,452		$	13,703		$	3,907		$	94,378
Loans
ACI loans collectively evaluated for impairment	$	13,018		$	58,171		$	120,717		$	—		$	191,906
ACI loans individually evaluated for impairment		3,789			7,256			324			—			11,369
ANCI loans collectively evaluated for impairment		50,469			7,808			280,776			8,462			347,515
ANCI loans individually evaluated for impairment		—			—			1,538			279			1,817
Originated loans collectively evaluated for impairment		6,053,264			1,257,504			1,891,144			257,542			9,459,454
Originated loans individually evaluated for impairment		76,802			—			254			—			77,056
Loans as of December 31, 2018	$	6,197,342		$	1,330,739		$	2,294,753		$	266,283		$	10,089,117

	For the Year Ended December 31, 2017
(In thousands)	Commercial and Industrial			Commercial Real Estate			Consumer			Small Business			Total
As of December 31, 2016	$	54,688		$	10,103		$	13,265		$	4,212		$	82,268
Provision for loan losses		5,883			1,737			1,746			369			9,735
Charge-offs		(5,645	)		(93	)		(929	)		(204	)		(6,871	)
Recoveries		993			243			901			307			2,444
As of December 31, 2017	$	55,919		$	11,990		$	14,983		$	4,684		$	87,576

Allocation of ending ACL
ACI loans collectively evaluated for impairment	$	5		$	2,006		$	6,289		$	—		$	8,300
ACI loans individually evaluated for impairment		—			4			220			—			224
ANCI loans collectively evaluated for impairment		864			130			49			295			1,338
ANCI loans individually evaluated for impairment		—			—			36			22			58
Originated loans collectively evaluated for impairment		46,591			9,850			8,389			4,362			69,192
Originated loans individually evaluated for impairment		8,459			—			—			5			8,464
ACL as of December 31, 2017	$	55,919		$	11,990		$	14,983		$	4,684		$	87,576
Loans
ACI loans collectively evaluated for impairment	$	19,486		$	71,675		$	150,798		$	—		$	241,959
ACI loans individually evaluated for impairment		10,091			8,186			324			—			18,601
ANCI loans collectively evaluated for impairment		58,775			15,926			113,357			11,331			199,389
ANCI loans individually evaluated for impairment		—			—			1,582			310			1,892
Originated loans collectively evaluated for impairment		4,974,973			1,062,614			1,499,260			209,627			7,746,474
Originated loans individually evaluated for impairment		70,461			—			415			587			71,463
Loans as of December 31, 2017	$	5,133,786		$	1,158,401		$	1,765,736		$	221,855		$	8,279,778

	For the Year Ended December 31, 2016
(In thousands)	Commercial and Industrial			Commercial Real Estate		Consumer			Small Business			Total
As of December 31, 2015	$	55,824		$	8,136	$	13,450		$	2,373		$	79,783
Provision for loan losses		43,782			1,389		1,506			2,671			49,348
Charge-offs		(46,367	)		—		(2,094	)		(841	)		(49,302	)
Recoveries		1,449			578		403			9			2,439
As of December 31, 2016	$	54,688		$	10,103	$	13,265		$	4,212		$	82,268

Allocation of ending ACL
ACI loans collectively evaluated for impairment	$	176		$	2,652	$	7,215		$	—		$	10,043
ACI loans individually evaluated for impairment		—			3		232			—			235
ANCI loans collectively evaluated for impairment		299			243		94			272			908
ANCI loans individually evaluated for impairment		—			—		37			33			70
Originated loans collectively evaluated for impairment		52,615			7,205		5,687			3,900			69,407
Originated loans individually evaluated for impairment		1,598			—		—			7			1,605
ACL as of December 31, 2016	$	54,688		$	10,103	$	13,265		$	4,212		$	82,268

Summary of Impaired Loans

The following includes certain key information about individually impaired loans as of December 31, 2018 and 2017.

Originated and ANCI Loans Identified as Impaired

	As of December 31, 2018
(In thousands)	Recorded Investment in Impaired Loans⁽¹⁾		Unpaid Principal Balance		Related Specific Allowance		Nonaccrual Loans Included in Impaired Loans		Undisbursed Commitments
With no related allowance for credit losses
Commercial and Industrial
Energy sector	$	20,713	$	33,908	$	—	$	20,713	$	3,658
Total commercial and industrial		20,713		33,908		—		20,713		3,658
Consumer
Residential real estate		1,538		1,535		—		—		—
Total consumer		1,538		1,535		—		—		—
Total	$	22,251	$	35,443	$	—	$	20,713	$	3,658
With allowance for credit losses recorded
Commercial and Industrial
General C&I	$	28,684	$	28,677	$	3,559	$	24,103	$	930
Restaurant industry		23,043		23,698		3,485		22,042		2,329
Healthcare		4,496		4,496		256		4,496		-
Total commercial and industrial		56,223		56,871		7,300		50,641		3,259
Consumer
Other		254		254		25		—		—
Total consumer		254		254		25		—		—
Small Business Lending		476		1,249		107		229		10
Total	$	56,953	$	58,374	$	7,432	$	50,870	$	3,269

	As of December 31, 2017
(In thousands)	Recorded Investment in Impaired Loans ⁽¹⁾		Unpaid Principal Balance		Related Specific Allowance		Nonaccrual Loans Included in Impaired Loans		Undisbursed Commitments
With no related allowance for credit losses
Commercial and Industrial
General C&I	$	5,010	$	4,994	$	—	$	192	$	—
Energy sector		14,822		23,307		—		14,822		387
Total commercial and industrial		19,832		28,301		—		15,014		387
Consumer
Residential real estate		1,093		1,097		—		35		—
Other		416		415		—		—		—
Total consumer		1,509		1,512		—		35		—
Small Business Lending		249		695		—		249		—
Total	$	21,590	$	30,508	$	—	$	15,298	$	387
With allowance for credit losses recorded
Commercial and Industrial
Energy sector	$	39,857	$	43,416	$	8,353	$	28,000	$	402
Restaurant industry		11,017		10,969		106		—		2,500
Total commercial and industrial		50,874		54,385		8,459		28,000		2,902
Consumer
Residential real estate		496		494		36		—		—
Small Business Lending		650		921		27		60		—
Total	$	52,020	$	55,800	$	8,522	$	28,060	$	2,902

(1)	The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.

Originated and Acquired Non Credit Impaired Loans

Accounts Notes And Loans Receivable [Line Items]

Summary of Average Recorded Investment in Impaired Originated and ANCI Loans

Average Recorded Investment in Impaired Originated and ANCI Loans

	Year Ended December 31,
(In thousands)	2018		2017		2016
Commercial and Industrial
General C&I	$	10,834	$	8,586	$	11,291
Energy sector		27,348		108,751		158,192
Restaurant industry		16,600		2,203		—
Healthcare		1,124		—		—
Total commercial and industrial		55,906		119,540		169,483
Consumer
Residential real estate		1,557		1,426		1,206
Other		313		386		398
Total consumer		1,870		1,812		1,604
Small Business Lending		420		945		547
Total	$	58,196	$	122,297	$	171,634

Summary of Originated and ANCI Loans that were modified into TDRs

Originated and ANCI Loans modified into TDRs

	For the Year Ended December 31,
	2018				2017				2016
(In thousands)	Number of TDRs		Recorded Investment		Number of TDRs		Recorded Investment		Number of TDRs		Recorded Investment
Commercial and Industrial		4	$	30,244		3	$	16,027		6	$	43,609
Consumer		—		—		2		739		2		534
Small Business Lending		2		141		1		138		1		552
Total		6	$	30,385		6	$	16,904		9	$	44,695

	For the Year Ended December 31,
	2018				2017				2016
	Number of Loans Modified by:
	Rate Concession		Modified Terms and/ or Other Concessions		Rate Concession		Modified Terms and/ or Other Concessions			Forbearance Agreement		Rate Concession		Modified Terms and/ or Other Concessions
Commercial and Industrial		—		4		2		1			2		1		3
Consumer		—		—		—		2			—		—		2
Small Business Lending		2		—		1		—			—		1		—
Total		2		4		3		3			2		2		5

Summary of Credit Exposure by Portfolio Segment and Class of Receivable

The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017:

	As of December 31, 2018
(Recorded Investment in thousands)	Special Mention		Substandard		Doubtful		Total Criticized / Classified
Commercial and Industrial
General C&I	$	74,592	$	79,815	$	—	$	154,407
Restaurant industry		24,449		26,171		—		50,620
Energy sector		11,812		6,227		14,486		32,525
Healthcare		—		4,496		—		4,496
Total commercial and industrial		110,853		116,709		14,486		242,048
Commercial Real Estate
Land and development		—		985		—		985
Total commercial real estate		—		985		—		985
Consumer ⁽¹⁾
Residential real estate		—		3,315		—		3,315
Total consumer		—		3,315		—		3,315
Small Business Lending		772		2,013		—		2,785
Total	$	111,625	$	123,022	$	14,486	$	249,133

(1)

During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of criticized and classified loans from the previous periods.

	As of December 31, 2017
(Recorded Investment in thousands)	Special Mention		Substandard		Doubtful		Total Criticized / Classified
Commercial and Industrial
General C&I	$	80,550	$	47,324	$	—	$	127,874
Restaurant industry		4,536		12,506		—		17,042
Energy sector		—		99,979		7,634		107,613
Healthcare		—		71		—		71
Total commercial and industrial		85,086		159,880		7,634		252,600
Commercial Real Estate
Income producing		—		26		—		26
Land and development		20		—		—		20
Total commercial real estate		20		26		—		46
Consumer
Residential real estate		7,610		12,416		—		20,026
Other		673		356		4		1,033
Total consumer		8,283		12,772		4		21,059
Small Business Lending		3,480		1,375		27		4,882
Total	$	96,869	$	174,053	$	7,665	$	278,587

Past Due Financing Receivables

The following provides an aging of past due loans by portfolio segment and class of receivable as of December 31, 2018 and 2017:

Aging of Past Due Originated and ANCI Loans

	As of December 31, 2018
	Accruing Loans						Non-Accruing Loans
(Recorded Investment in thousands)	30-59 DPD		60-89 DPD		90+DPD		0-29 DPD		30-59 DPD		60-89 DPD		90+DPD
Commercial and Industrial
General C&I	$	120	$	—	$	—	$	23,928	$	176	$	—	$	—
Restaurant industry		—		—		—		22,043		—		—		—
Energy sector		—		—		—		20,712		—		—		—
Healthcare		—		—		—		4,496		—		—		—
Total commercial and industrial		120		—		—		71,179		176		—		—
Commercial Real Estate
Income producing		—		—		—		—		—		—		—
Land and development		—		61		—		—		—		—		—
Total commercial real estate		—		61		—		—		—		—		—
Consumer
Residential real estate		1,275		315		760		876		151		95		1,429
Other		27		112		—		—		—		—		—
Total consumer		1,302		427		760		876		151		95		1,429
Small Business Lending		491		25		—		250		29		4		50
Total	$	1,913	$	513	$	760	$	72,305	$	356	$	99	$	1,479

	As of December 31, 2017
	Accruing Loans						Non-Accruing Loans
(Recorded Investment in thousands)	30-59 DPD		60-89 DPD		90+DPD		0-29 DPD		30-59 DPD		60-89 DPD		90+DPD
Commercial and Industrial
General C&I	$	59	$	—	$	476	$	—	$	192	$	—	$	—
Energy sector		—		—		—		32,315		—		—		10,507
Healthcare		—		—		—		—		71		—		—
Total commercial and industrial		59		—		476		32,315		263		—		10,507
Commercial Real Estate
Income producing		—		—		26		—		—		—		—
Land and development		55		—		—		—		—		—		—
Total commercial real estate		55		—		26		—		—		—		—
Consumer
Residential real estate		3,191		1,030		325		1,070		173		293		2,205
Other		532		3		—		—		—		—		—
Total consumer		3,723		1,033		325		1,070		173		293		2,205
Small Business Lending		931		328		—		110		38		—		494
Total	$	4,768	$	1,361	$	827	$	33,495	$	474	$	293	$	13,206

ACI Loans

Accounts Notes And Loans Receivable [Line Items]

Summary of Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable

The following table presents total ACI loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017.

	As of
(In thousands)	December 31, 2018		December 31, 2017
Commercial and Industrial
General C&I	$	16,807	$	23,428
Healthcare		—		6,149
Total commercial and industrial		16,807		29,577
Commercial Real Estate
Income producing		65,427		79,861
Total commercial real estate		65,427		79,861
Consumer
Residential real estate		120,495		149,942
Other		546		1,180
Total consumer		121,041		151,122
Total	$	203,275	$	260,560

Summary of Credit Exposure by Portfolio Segment and Class of Receivable

The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017:

ACI Loans by Risk Rating / Delinquency Stratification

ACI loans based on internal risk rating:

	As of
	December 31, 2018						December 31, 2017
(Recorded Investment in thousands)	Special Mention		Substandard		Doubtful		Special Mention		Substandard		Doubtful
Commercial and Industrial
General C&I	$	426	$	1,445	$	39	$	737	$	1,173	$	37
Healthcare		—		—		—		—		6,148		—
Total commercial and industrial		426		1,445		39		737		7,321		37
Commercial Real Estate
Income producing		1,207		3,080		—		2,179		6,515		—
Total commercial real estate		1,207		3,080		—		2,179		6,515		—
Consumer
Residential real estate		89		4,442		—		3,900		22,635		—
Other		—		3		—		114		417		—
Total consumer		89		4,445		—		4,014		23,052
Total	$	1,722	$	8,970	$	39	$	6,930	$	36,888	$	37

Past Due Financing Receivables

ACI Consumer credit exposure, based on past due status:

	As of
	December 31, 2018 ⁽¹⁾				December 31, 2017
(Recorded Investment in thousands)	Residential Real Estate		Other		Residential Real Estate		Other
0 – 29 Days Past Due	$	115,404	$	845	$	139,662	$	1,356
30 – 59 Days Past Due		1,985		91		2,299		120
60 – 89 Days Past Due		1,435		—		2,496		62
90 – 119 Days Past Due		217		3		399		—
120 + Days Past Due		3,598		—		7,480		45
Total	$	122,639	$	939	$	152,336	$	1,583

(1)

Summary of Changes in Accretable Discount for ACI Loans

Changes in the amount of accretable discount for ACI loans for each of the years in the period ended December 31, 2018:

Changes in Accretable Yield on ACI Loans

	For the Year Ended December 31,
(In thousands)	2018			2017			2016
Balance at beginning of period	$	78,422		$	98,728		$	122,791
Maturities/payoff		(7,456	)		(9,888	)		(11,563	)
Charge-offs		(77	)		(129	)		(286	)
Foreclosure		(436	)		(1,061	)		(1,041	)
Accretion		(19,813	)		(23,303	)		(30,870	)
Reclass from nonaccretable difference due to increases in expected cash flow		16,765			14,075			19,697
Balance at end of period	$	67,405		$	78,422		$	98,728

Summary of Individually Impaired ACI Loans and Pooled ACI Loans

The following includes certain key information about individually impaired ACI loans and pooled ACI loans as of and for the years ended December 31, 2018 and 2017.

ACI Loans / Pools Identified as Impaired

	As of December 31, 2018
	ACI Loans / Pools Identified as Impaired
(In thousands)	Recorded Investment in Impaired Loans⁽¹⁾		Unpaid Principal Balance		Related Specific Allowance		Nonaccrual Loans Included in Impaired Loans		Undisbursed Commitments
Commercial and Industrial	$	2,100	$	2,331	$	58	$	—	$	—
Commercial Real Estate		74,017		97,613		1,641		—		—
Consumer		18,301		17,888		6,225		—		—
Total	$	94,418	$	117,832	$	7,924	$	—	$	—

	As of December 31, 2017
	ACI Loans / Pools Identified as Impaired
(In thousands)	Recorded Investment in Impaired Loans⁽¹⁾		Unpaid Principal Balance		Related Specific Allowance		Nonaccrual Loans Included in Impaired Loans		Undisbursed Commitments
Commercial and Industrial	$	13,541	$	17,630	$	5	$	—	$	—
Commercial Real Estate		82,856		112,330		2,010		225		—
Consumer		18,603		22,064		6,509		—		—
Total	$	115,000	$	152,024	$	8,524	$	225	$	—

(1)	The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.