LHFI and Allowance for Loan Losses, LHFI (Tables)

12 Months Ended

Dec. 31, 2017

Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]

Loan Portfolio Held for Investment

At December 31, 2017 and 2016, LHFI consisted of the following ($ in thousands):

	December 31,
	2017		2016
Loans secured by real estate:
Construction, land development and other land	$	987,624	$	831,437
Secured by 1-4 family residential properties		1,675,311		1,660,043
Secured by nonfarm, nonresidential properties		2,193,823		2,034,176
Other real estate secured		517,956		318,148
Commercial and industrial loans		1,570,345		1,528,434
Consumer loans		171,918		170,562
State and other political subdivision loans		952,483		917,515
Other loans		500,507		390,898
LHFI (1)		8,569,967		7,851,213
Less allowance for loan losses, LHFI		76,733		71,265
Net LHFI	$	8,493,234	$	7,779,948

Nonaccrual LHFI by Loan Type

The following table details nonaccrual LHFI by loan type at December 31, 2017 and 2016 ($ in thousands):

	December 31,
	2017		2016
Loans secured by real estate:
Construction, land development and other land	$	2,105	$	3,323
Secured by 1-4 family residential properties		19,022		20,329
Secured by nonfarm, nonresidential properties		12,608		8,482
Other real estate secured		212		402
Commercial and industrial loans		33,338		15,824
Consumer loans		135		300
State and other political subdivision loans		—		—
Other loans		155		574
Total nonaccrual LHFI	$	67,575	$	49,234

Aging Analysis of Past Due and Nonaccrual LHFI by Loan Type

The following tables provide an aging analysis of past due and nonaccrual LHFI by loan type at December 31, 2017 and 2016 ($ in thousands):

	December 31, 2017
	Past Due
					90 Days						Current
	30-59 Days		60-89 Days		or More(1)		Total		Nonaccrual		Loans		TotalLHFI
Loans secured by real estate:
Construction, land development and    other land	$	391	$	1	$	—	$	392	$	2,105	$	985,127	$	987,624
Secured by 1-4 family residential properties		6,412		2,084		1,917		10,413		19,022		1,645,876		1,675,311
Secured by nonfarm, nonresidential    properties		2,319		256		—		2,575		12,608		2,178,640		2,193,823
Other real estate secured		—		—		—		—		212		517,744		517,956
Commercial and industrial loans		759		1,233		12		2,004		33,338		1,535,003		1,570,345
Consumer loans		2,141		255		242		2,638		135		169,145		171,918
State and other political subdivision loans		350		39		—		389		—		952,094		952,483
Other loans		18		4		—		22		155		500,330		500,507
Total	$	12,390	$	3,872	$	2,171	$	18,433	$	67,575	$	8,483,959	$	8,569,967

(1) Past due 90 days or more but still accruing interest.

	December 31, 2016
	Past Due
					90 Days						Current
	30-59 Days		60-89 Days		or More(1)		Total		Nonaccrual		Loans		TotalLHFI
Loans secured by real estate:
Construction, land development and    other land	$	248	$	37	$	54	$	339	$	3,323	$	827,775	$	831,437
Secured by 1-4 family residential properties		5,308		2,434		1,436		9,178		20,329		1,630,536		1,660,043
Secured by nonfarm, nonresidential    properties		606		100		—		706		8,482		2,024,988		2,034,176
Other real estate secured		179		—		—		179		402		317,567		318,148
Commercial and industrial loans		571		213		—		784		15,824		1,511,826		1,528,434
Consumer loans		1,561		330		341		2,232		300		168,030		170,562
State and other political subdivision loans		1,035		—		—		1,035		—		916,480		917,515
Other loans		178		53		—		231		574		390,093		390,898
Total	$	9,686	$	3,167	$	1,831	$	14,684	$	49,234	$	7,787,295	$	7,851,213

(1) Past due 90 days or more but still accruing interest.

Impaired Financing Receivables

At December 31, 2017 and 2016, the carrying amount of LHFI individually evaluated for impairment consisted of the following ($ in thousands):

	December 31, 2017
	LHFI
	Unpaid		With No Related		With an		Total				Average
	Principal		Allowance		Allowance		Carrying		Related		Recorded
	Balance		Recorded		Recorded		Amount		Allowance		Investment
Loans secured by real estate:
Construction, land development and other land	$	1,704	$	1,206	$	199	$	1,405	$	75	$	1,923
Secured by 1-4 family residential properties		6,031		160		4,576		4,736		1,331		4,693
Secured by nonfarm, nonresidential properties		15,205		10,027		396		10,423		165		8,321
Other real estate secured		—		—		—		—		—		—
Commercial and industrial loans		36,874		31,281		518		31,799		131		22,734
Consumer loans		17		—		17		17		—		9
State and other political subdivision loans		—		—		—		—		—		—
Other loans		556		—		556		556		41		325
Total	$	60,387	$	42,674	$	6,262	$	48,936	$	1,743	$	38,005

	December 31, 2016
	LHFI
	Unpaid		With No Related		With an		Total				Average
	Principal		Allowance		Allowance		Carrying		Related		Recorded
	Balance		Recorded		Recorded		Amount		Allowance		Investment
Loans secured by real estate:
Construction, land development and other land	$	5,691	$	2,213	$	228	$	2,441	$	103	$	2,943
Secured by 1-4 family residential properties		6,134		221		4,428		4,649		960		4,639
Secured by nonfarm, nonresidential properties		8,562		5,784		435		6,219		221		6,703
Other real estate secured		—		—		—		—		—		500
Commercial and industrial loans		14,593		11,222		2,447		13,669		1,976		14,258
Consumer loans		2		—		2		2		—		2
State and other political subdivision loans		—		—		—		—		—		—
Other loans		95		—		95		95		—		95
Total	$	35,077	$	19,440	$	7,635	$	27,075	$	3,260	$	29,140

Impact of Modifications Classified as Troubled Debt Restructurings

The following tables illustrate the impact of modifications classified as TDRs as well as those TDRs modified within the last 12 months for which there was a payment default during the period for the periods presented ($ in thousands):

	Year Ended December 31, 2017
Modifications Classified as TDRs	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
Loans secured by real estate:
Construction, land development and other land		1	$	341	$	325
Secured by 1-4 family residential properties		22		1,478		1,487
Secured by nonfarm, nonresidential properties		1		426		426
Commercial and industrial loans		8		12,836		12,836
Other loans		1		556		556
Total		33	$	15,637	$	15,630

	Year Ended December 31, 2016
Modifications Classified as TDRs	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
Loans secured by real estate:
Construction, land development and other land		1	$	14	$	14
Secured by 1-4 family residential properties		18		1,386		1,391
Secured by nonfarm, nonresidential properties		2		717		717
Commercial and industrial loans		5		10,043		9,982
Consumer loans		1		2		2
Total		27	$	12,162	$	12,106

	Year Ended December 31, 2015
Modifications Classified as TDRs	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
Loans secured by real estate:
Secured by 1-4 family residential properties		13	$	688	$	688
Secured by nonfarm, nonresidential properties		5		3,613		3,613
Total		18	$	4,301	$	4,301

Troubled Debt Restructuring Subsequently Defaulted

	Years Ended December 31,
	2017				2016				2015
TDRs that Subsequently Defaulted	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Loans secured by 1-4 family residential properties		4	$	78		1	$	—		5	$	260
Commercial and industrial loans		3		9,526		2		2,154		—		—
Total		7	$	9,604		3	$	2,154		5	$	260

Troubled Debt Restructuring Related to Loans Held for Investment by Loan Type

The following tables detail LHFI classified as TDRs by loan type at December 31, 2017, 2016 and 2015 ($ in thousands):

	December 31, 2017
	Accruing		Nonaccrual		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	199	$	199
Secured by 1-4 family residential properties		51		3,140		3,191
Secured by nonfarm, nonresidential properties		—		421		421
Commercial and industrial loans		53		19,434		19,487
Consumer loans		—		17		17
Other loans		556		—		556
Total TDRs	$	660	$	23,211	$	23,871

	December 31, 2016
	Accruing		Nonaccrual		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	405	$	405
Secured by 1-4 family residential properties		—		2,873		2,873
Secured by nonfarm, nonresidential properties		—		881		881
Commercial and industrial loans		53		10,266		10,319
Consumer loans		—		2		2
Total TDRs	$	53	$	14,427	$	14,480

	December 31, 2015
	Accruing		Nonaccrual		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	869	$	869
Secured by 1-4 family residential properties		1,426		2,424		3,850
Secured by nonfarm, nonresidential properties		809		3,662		4,471
Commercial and industrial loans		—		463		463
Total TDRs	$	2,235	$	7,418	$	9,653

Carrying Amount of Loans by Credit Quality Indicator

The tables below present LHFI by loan type and credit quality indicator at December 31, 2017 and 2016 ($ in thousands):

	December 31, 2017
	Commercial LHFI
	Pass -		Special Mention -		Substandard -		Doubtful -
	Categories1-6		Category 7		Category 8		Category 9		Subtotal
Loans secured by real estate:
Construction, land development and other land	$	922,563	$	316	$	3,780	$	222	$	926,881
Secured by 1-4 family residential properties		127,405		134		4,948		76		132,563
Secured by nonfarm, nonresidential properties		2,135,749		6,684		50,785		527		2,193,745
Other real estate secured		517,036		—		517		—		517,553
Commercial and industrial loans		1,437,590		28,780		103,089		886		1,570,345
Consumer loans		—		—		—		—		—
State and other political subdivision loans		936,420		5,850		10,213		—		952,483
Other loans		478,083		—		16,390		108		494,581
Total	$	6,554,846	$	41,764	$	189,722	$	1,819	$	6,788,151

	Consumer LHFI
			Past Due		Past Due
	Current		30-89 Days		90 Days or More		Nonaccrual		Subtotal		Total LHFI
Loans secured by real estate:
Construction, land development and other land	$	60,240	$	342	$	—	$	161	$	60,743	$	987,624
Secured by 1-4 family residential properties		1,516,691		7,874		1,809		16,374		1,542,748		1,675,311
Secured by nonfarm, nonresidential properties		78		—		—		—		78		2,193,823
Other real estate secured		403		—		—		—		403		517,956
Commercial and industrial loans		—		—		—		—		—		1,570,345
Consumer loans		169,146		2,396		242		134		171,918		171,918
State and other political subdivision loans		—		—		—		—		—		952,483
Other loans		5,926		—		—		—		5,926		500,507
Total	$	1,752,484	$	10,612	$	2,051	$	16,669	$	1,781,816	$	8,569,967

	December 31, 2016
	Commercial LHFI
	Pass -		Special Mention -		Substandard -		Doubtful -
	Categories 1-6		Category 7		Category 8		Category 9		Subtotal
Loans secured by real estate:
Construction, land development and other land	$	752,318	$	9,567	$	8,086	$	465	$	770,436
Secured by 1-4 family residential properties		124,615		170		6,162		129		131,076
Secured by nonfarm, nonresidential properties		1,989,554		4,394		38,913		584		2,033,445
Other real estate secured		315,829		762		890		—		317,481
Commercial and industrial loans		1,386,155		7,095		134,199		985		1,528,434
Consumer loans		—		—		—		—		—
State and other political subdivision loans		899,935		6,450		11,130		—		917,515
Other loans		382,890		—		2,685		350		385,925
Total	$	5,851,296	$	28,438	$	202,065	$	2,513	$	6,084,312

	Consumer LHFI
			Past Due		Past Due
	Current		30-89 Days		90Days or More		Nonaccrual		Subtotal		Total LHFI
Loans secured by real estate:
Construction, land development and other land	$	60,701	$	188	$	54	$	58	$	61,001	$	831,437
Secured by 1-4 family residential properties		1,503,096		7,377		1,436		17,058		1,528,967		1,660,043
Secured by nonfarm, nonresidential properties		731		—		—		—		731		2,034,176
Other real estate secured		667		—		—		—		667		318,148
Commercial and industrial loans		—		—		—		—		—		1,528,434
Consumer loans		168,031		1,891		341		299		170,562		170,562
State and other political subdivision loans		—		—		—		—		—		917,515
Other loans		4,940		33		—		—		4,973		390,898
Total	$	1,738,166	$	9,489	$	1,831	$	17,415	$	1,766,901	$	7,851,213

Change in Allowance for Loan Losses

The following tables detail the balance in the allowance for loan losses, LHFI allocated to each loan type segmented by the impairment evaluation methodology used at December 31, 2017 and 2016 ($ in thousands):

	December 31, 2017
	Individually		Collectively		Total
Loans secured by real estate:
Construction, land development and other land	$	75	$	7,790	$	7,865
Secured by 1-4 family residential properties		1,331		9,543		10,874
Secured by nonfarm, nonresidential properties		165		23,263		23,428
Other real estate secured		—		2,790		2,790
Commercial and industrial loans		131		22,720		22,851
Consumer loans		—		3,470		3,470
State and other political subdivision loans		—		789		789
Other loans		41		4,625		4,666
Total allowance for loan losses, LHFI	$	1,743	$	74,990	$	76,733

	December 31, 2016
	Individually		Collectively		Total
Loans secured by real estate:
Construction, land development and other land	$	103	$	8,982	$	9,085
Secured by 1-4 family residential properties		960		9,387		10,347
Secured by nonfarm, nonresidential properties		221		20,746		20,967
Other real estate secured		—		2,263		2,263
Commercial and industrial loans		1,976		20,035		22,011
Consumer loans		—		3,241		3,241
State and other political subdivision loans		—		859		859
Other loans		—		2,492		2,492
Total allowance for loan losses, LHFI	$	3,260	$	68,005	$	71,265

Changes in the allowance for loan losses, LHFI were as follows for the periods presented ($ in thousands):

	Years Ended December 31,
	2017			2016			2015
Balance at beginning of period	$	71,265		$	67,619		$	69,616
Loans charged-off		(21,147	)		(18,930	)		(22,469	)
Recoveries		11,521			11,619			12,097
Net (charge-offs) recoveries		(9,626	)		(7,311	)		(10,372	)
Provision for loan losses, LHFI		15,094			10,957			8,375
Balance at end of period	$	76,733		$	71,265		$	67,619

The following tables detail changes in the allowance for loan losses, LHFI by loan type for the years ended December 31, 2017 and 2016, respectively ($ in thousands):

	2017
	Balance							Provision for			Balance
	January 1,		Charge-offs			Recoveries		Loan Losses			December 31,
Loans secured by real estate:
Construction, land development and other land	$	9,085	$	(79	)	$	1,428	$	(2,569	)	$	7,865
Secured by 1-4 family residential properties		10,347		(950	)		1,833		(356	)		10,874
Secured by nonfarm, nonresidential properties		20,967		(4,231	)		396		6,296			23,428
Other real estate secured		2,263		(5	)		69		463			2,790
Commercial and industrial loans		22,011		(8,286	)		2,578		6,548			22,851
Consumer loans		3,241		(2,546	)		1,938		837			3,470
State and other political subdivision loans		859		—			—		(70	)		789
Other loans		2,492		(5,050	)		3,279		3,945			4,666
Total allowance for loan losses, LHFI	$	71,265	$	(21,147	)	$	11,521	$	15,094		$	76,733

	2016
	Balance							Provision for			Balance
	January 1,		Charge-offs			Recoveries		Loan Losses			December 31,
Loans secured by real estate:
Construction, land development and other land	$	11,587	$	(311	)	$	1,380	$	(3,571	)	$	9,085
Secured by 1-4 family residential properties		10,678		(1,319	)		1,122		(134	)		10,347
Secured by nonfarm, nonresidential properties		21,563		(3,067	)		976		1,495			20,967
Other real estate secured		2,467		(27	)		7		(184	)		2,263
Commercial and industrial loans		15,815		(6,602	)		732		12,066			22,011
Consumer loans		2,879		(1,864	)		4,007		(1,781	)		3,241
State and other political subdivision loans		809		—			—		50			859
Other loans		1,821		(5,740	)		3,395		3,016			2,492
Total allowance for loan losses, LHFI	$	67,619	$	(18,930	)	$	11,619	$	10,957		$	71,265

Summary Of LHFI Evaluated For Impairment

The following tables detail LHFI by loan type related to each balance in the allowance for loan losses, LHFI segregated by the impairment evaluation methodology used at December 31, 2017 and 2016 ($ in thousands):

	December 31, 2017
	LHFI Evaluated for Impairment
	Individually		Collectively		Total
Loans secured by real estate:
Construction, land development and other land	$	1,405	$	986,219	$	987,624
Secured by 1-4 family residential properties		4,736		1,670,575		1,675,311
Secured by nonfarm, nonresidential properties		10,423		2,183,400		2,193,823
Other real estate secured		—		517,956		517,956
Commercial and industrial loans		31,799		1,538,546		1,570,345
Consumer loans		17		171,901		171,918
State and other political subdivision loans		—		952,483		952,483
Other loans		556		499,951		500,507
Total	$	48,936	$	8,521,031	$	8,569,967

	December 31, 2016
	LHFI Evaluated for Impairment
	Individually		Collectively		Total
Loans secured by real estate:
Construction, land development and other land	$	2,441	$	828,996	$	831,437
Secured by 1-4 family residential properties		4,649		1,655,394		1,660,043
Secured by nonfarm, nonresidential properties		6,219		2,027,957		2,034,176
Other real estate secured		—		318,148		318,148
Commercial and industrial loans		13,669		1,514,765		1,528,434
Consumer loans		2		170,560		170,562
State and other political subdivision loans		—		917,515		917,515
Other loans		95		390,803		390,898
Total	$	27,075	$	7,824,138	$	7,851,213