Loans and Allowance for Credit Losses (Tables)

6 Months Ended

Jun. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Outstanding Balances of Loan

The following table provides outstanding balances related to each of our loan types:

	June 30, 2018						December 31, 2017
	Originated		Acquired		Total		Originated		Acquired		Total
	(dollars in thousands)
Commercial, financial, agricultural and other	$	1,088,075	$	42,563	$	1,130,638	$	1,122,741	$	40,642	$	1,163,383
Real estate construction	250,695		9,130		259,825		242,905		5,963		248,868
Residential real estate	1,251,353		267,497		1,518,850		1,206,119		220,251		1,426,370
Commercial real estate	1,948,287		224,328		2,172,615		1,892,185		126,911		2,019,096
Loans to individuals	551,647		6,531		558,178		543,411		6,248		549,659
Total loans	$	5,090,057	$	550,049	$	5,640,106	$	5,007,361	$	400,015	$	5,407,376

Credit Risk Profile by Creditworthiness

The following tables represent our credit risk profile by creditworthiness:

	June 30, 2018
	Commercial, financial, agricultural and other		Real estate construction		Residential real estate		Commercial real estate		Loans to individuals		Total
	(dollars in thousands)
Originated loans
Pass	$	1,011,631	$	250,695	$	1,239,626	$	1,908,710	$	551,492	$	4,962,154
Non-Pass
OAEM	51,197		—		1,614		20,662		—		73,473
Substandard	18,409		—		10,113		18,915		155		47,592
Doubtful	6,838		—		—		—		—		6,838
Total Non-Pass	76,444		—		11,727		39,577		155		127,903
Total	$	1,088,075	$	250,695	$	1,251,353	$	1,948,287	$	551,647	$	5,090,057
Acquired loans
Pass	$	37,075	$	9,130	$	263,650	$	219,437	$	6,515	$	535,807
Non-Pass
OAEM	5,349		—		734		2,078		—		8,161
Substandard	139		—		3,113		2,813		16		6,081
Doubtful	—		—		—		—		—		—
Total Non-Pass	5,488		—		3,847		4,891		16		14,242
Total	$	42,563	$	9,130	$	267,497	$	224,328	$	6,531	$	550,049

	December 31, 2017
	Commercial, financial, agricultural and other		Real estate construction		Residential real estate		Commercial real estate		Loans to individuals		Total
	(dollars in thousands)
Originated loans
Pass	$	1,061,147	$	242,905	$	1,194,352	$	1,855,253	$	543,175	$	4,896,832
Non-Pass
OAEM	26,757		—		1,435		13,326		—		41,518
Substandard	30,431		—		10,332		23,606		236		64,605
Doubtful	4,406		—		—		—		—		4,406
Total Non-Pass	61,594		—		11,767		36,932		236		110,529
Total	$	1,122,741	$	242,905	$	1,206,119	$	1,892,185	$	543,411	$	5,007,361
Acquired loans
Pass	$	34,573	$	5,963	$	217,824	$	121,536	$	6,231	$	386,127
Non-Pass
OAEM	5,567		—		798		3,517		—		9,882
Substandard	502		—		1,629		1,858		17		4,006
Doubtful	—		—		—		—		—		—
Total Non-Pass	6,069		—		2,427		5,375		17		13,888
Total	$	40,642	$	5,963	$	220,251	$	126,911	$	6,248	$	400,015

Age Analysis of Past Due Loans by Segment

The following tables delineate the aging analysis of the recorded investments in past due loans as of June 30, 2018 and December 31, 2017. Also included in these tables are loans that are 90 days or more past due and still accruing because they are well-secured and in the process of collection.

	June 30, 2018
	30 - 59 days past due		60 - 89 days past due		90 days and greater and still accruing		Nonaccrual		Total past due and nonaccrual		Current		Total
	(dollars in thousands)
Originated loans
Commercial, financial, agricultural and other	$	53	$	317	$	91	$	19,771	$	20,232	$	1,067,843	$	1,088,075
Real estate construction	—		—		—		—		—		250,695		250,695
Residential real estate	3,192		830		800		6,243		11,065		1,240,288		1,251,353
Commercial real estate	448		1,727		160		3,824		6,159		1,942,128		1,948,287
Loans to individuals	1,715		288		624		155		2,782		548,865		551,647
Total	$	5,408	$	3,162	$	1,675	$	29,993	$	40,238	$	5,049,819	$	5,090,057
Acquired loans
Commercial, financial, agricultural and other	$	160	$	—	$	11	$	73	$	244	$	42,319	$	42,563
Real estate construction	—		—		—		—		—		9,130		9,130
Residential real estate	238		9		21		2,589		2,857		264,640		267,497
Commercial real estate	—		—		—		2,030		2,030		222,298		224,328
Loans to individuals	28		28		18		16		90		6,441		6,531
Total	$	426	$	37	$	50	$	4,708	$	5,221	$	544,828	$	550,049

	December 31, 2017
	30 - 59 days past due		60 - 89 days past due		90 days and greater and still accruing		Nonaccrual		Total past due and nonaccrual		Current		Total
	(dollars in thousands)
Originated loans
Commercial, financial, agricultural and other	$	378	$	61	$	40	$	18,741	$	19,220	$	1,103,521	$	1,122,741
Real estate construction	199		—		—		—		199		242,706		242,905
Residential real estate	4,618		1,025		1,076		6,225		12,944		1,193,175		1,206,119
Commercial real estate	2,198		28		6		3,240		5,472		1,886,713		1,892,185
Loans to individuals	1,899		769		623		236		3,527		539,884		543,411
Total	$	9,292	$	1,883	$	1,745	$	28,442	$	41,362	$	4,965,999	$	5,007,361
Acquired loans
Commercial, financial, agricultural and other	$	6	$	7	$	—	$	436	$	449	$	40,193	$	40,642
Real estate construction	—		—		—		—		—		5,963		5,963
Residential real estate	148		9		83		705		945		219,306		220,251
Commercial real estate	—		—		—		1,077		1,077		125,834		126,911
Loans to individuals	36		20		26		17		99		6,149		6,248
Total	$	190	$	36	$	109	$	2,235	$	2,570	$	397,445	$	400,015

Recorded Investment and Unpaid Principal Balance for Impaired Loans with Associated Allowance

The following tables include the recorded investment and unpaid principal balance for impaired loans with the associated allowance amount, if applicable, as of June 30, 2018 and December 31, 2017. Also presented are the average recorded investment in impaired loans and the related amount of interest recognized while the loan was considered impaired. Average balances are calculated using month-end balances of the loans for the period reported and are included in the table below based on their period-end allowance position.

	June 30, 2018						December 31, 2017
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
	(dollars in thousands)
Originated loans:
With no related allowance recorded:
Commercial, financial, agricultural and other	$	1,932	$	6,769			$	5,548	$	12,153
Real estate construction	—		—				—		—
Residential real estate	10,347		12,174				10,625		12,470
Commercial real estate	4,463		7,073				5,155		5,489
Loans to individuals	253		292				347		383
Subtotal	16,995		26,308				21,675		30,495
With an allowance recorded:
Commercial, financial, agricultural and other	19,537		19,889		$	6,597	16,866		21,094		$	3,478
Real estate construction	—		—		—		—		—		—
Residential real estate	877		948		281		456		478		107
Commercial real estate	3,704		3,735		662		954		954		128
Loans to individuals	—		—		—		—		—		—
Subtotal	24,118		24,572		7,540		18,276		22,526		3,713
Total	$	41,113	$	50,880	$	7,540	$	39,951	$	53,021	$	3,713

	June 30, 2018						December 31, 2017
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
	(dollars in thousands)
Acquired loans
With no related allowance recorded:
Commercial, financial, agricultural and other	$	73	$	73			$	436	$	449
Real estate construction	—		—				—		—
Residential real estate	2,534		3,056				666		965
Commercial real estate	2,030		2,994				940		1,842
Loans to individuals	16		17				17		17
Subtotal	4,653		6,140				2,059		3,273
With an allowance recorded:
Commercial, financial, agricultural and other	—		—		$	—	—		—		$	—
Real estate construction	—		—		—		—		—		—
Residential real estate	97		112		61		93		122		4
Commercial real estate	—		—		—		137		150		29
Loans to individuals	—		—		—		—		—		—
Subtotal	97		112		61		230		272		33
Total	$	4,750	$	6,252	$	61	$	2,289	$	3,545	$	33

	For the Six Months Ended June 30,
	2018								2017
	Originated Loans				Acquired Loans				Originated Loans				Acquired Loans
	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
	(dollars in thousands)
With no related allowance recorded:
Commercial, financial, agricultural and other	$	8,034	$	528	$	355	$	—	$	13,888	$	289	$	36	$	—
Real estate construction	—		—		—		—		—		—		50		—
Residential real estate	10,316		125		1,366		1		11,434		185		465		7
Commercial real estate	6,076		54		1,359		—		6,586		88		1,575		—
Loans to individuals	322		4		17		—		341		11		—		—
Subtotal	24,748		711		3,097		1		32,249		573		2,126		7
With an allowance recorded:
Commercial, financial, agricultural and other	19,694		52		—		—		9,220		46		82		—
Real estate construction	—		—		—		—		—		—		—		—
Residential real estate	845		9		32		—		279		—		7		—
Commercial real estate	2,477		35		—		—		484		13		161		—
Loans to individuals	—		—		—		—		—		—		—		—
Subtotal	23,016		96		32		—		9,983		59		250		—
Total	$	47,764	$	807	$	3,129	$	1	$	42,232	$	632	$	2,376	$	7

	For the Three Months Ended June 30,
	2018								2017
	Originated Loans				Acquired Loans				Originated Loans				Acquired Loans
	Average recorded investment		Interest Income Recognized		Average recorded investment		Interest Income Recognized		Average recorded investment		Interest Income Recognized		Average recorded investment		Interest Income Recognized
	(dollars in thousands)
With no related allowance recorded:
Commercial, financial, agricultural and other	$	6,793	$	481	$	299	$	—	$	12,583	$	251	$	72	$	—
Real estate construction	—		—		—		—		—		—		100		—
Residential real estate	10,334		64		1,962		1		11,339		110		623		7
Commercial real estate	6,086		23		1,692		—		6,596		34		3,151		—
Loans to individuals	292		3		16		—		344		9		—		—
Subtotal	23,505		571		3,969		1		30,862		404		3,946		7
With an allowance recorded:
Commercial, financial, agricultural and other	22,812		23		—		—		8,813		20		164		—
Real estate construction	—		—		—		—		—		—		—		—
Residential real estate	880		5		65		—		332		—		14		—
Commercial real estate	3,551		34		—		—		481		6		160		—
Loans to individuals	—		—		—		—		—		—		—		—
Subtotal	27,243		62		65		—		9,626		26		338		—
Total	$	50,748	$	633	$	4,034	$	1	$	40,488	$	430	$	4,284	$	7

Troubled Debt Restructured Loans and Commitments

The following table provides detail as to the total troubled debt restructured loans and total commitments outstanding on troubled debt restructured loans:

	June 30, 2018		December 31, 2017
	(dollars in thousands)
Troubled debt restructured loans
Accrual status	$	11,162	$	11,563
Nonaccrual status	18,573		11,222
Total	$	29,735	$	22,785
Commitments
Letters of credit	$	60	$	60
Unused lines of credit	1,572		54
Total	$	1,632	$	114

The following tables provide detail, including specific reserves and reasons for modification, related to loans identified as troubled debt restructurings:

	For the Six Months Ended June 30, 2018
		Type of Modification
	Number of Contracts	Extend Maturity		Modify Rate		Modify Payments		Total Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Specific Reserve
	(dollars in thousands)
Commercial, financial, agricultural and other	8	$	4,710	$	—	$	11,679	$	16,389	$	11,972	$	4,095
Residential real estate	17	20		75		729		824		779		—
Commercial real estate	3	3,017		—		966		3,983		3,870		206
Loans to individuals	7	—		52		26		78		69		—
Total	35	$	7,747	$	127	$	13,400	$	21,274	$	16,690	$	4,301

	For the Six Months Ended June 30, 2017
		Type of Modification
	Number of Contracts	Extend Maturity		Modify Rate		Modify Payments		Total Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Specific Reserve
	(dollars in thousands)
Commercial, financial, agricultural and other	4	$	6,768	$	1,786	$	—	$	8,554	$	6,422	$	960
Residential real estate	12	129		187		413		729		683		4
Commercial real estate	3	179		—		84		263		258		—
Loans to individuals	7	—		17		48		65		56		—
Total	26	$	7,076	$	1,990	$	545	$	9,611	$	7,419	$	964

The troubled debt restructurings included in the above tables are also included in the impaired loan tables provided earlier in this note. Loans defined as modified due to a change in rate may include loans that were modified for a change in rate as well as a re-amortization of the principal and an extension of the maturity. For the six months endedJune 30, 2018 and 2017, $0.1 million and $0.2 million, respectively, of total rate modifications represent loans with modifications to the rate as well as payment as a result of re-amortization. For both 2018 and 2017 the changes in loan balances between the pre-modification balance and the post-modification balance are due to customer payments.

The following tables provide detail, including specific reserves and reasons for modification, related to loans identified as troubled debt restructurings:

	For the Three Months Ended June 30, 2018
		Type of Modification
	Number of Contracts	Extend Maturity		Modify Rate		Modify Payments		Total Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Specific Reserve
	(dollars in thousands)
Commercial, financial, agricultural and other	7	$	—	$	—	$	11,679	$	11,679	$	11,591	$	3,714
Residential real estate	6	—		—		383		383		381		—
Commercial real estate	2	—		—		966		966		960		—
Loans to individuals	4	—		24		14		38		35		—
Total	19	$	—	$	24	$	13,042	$	13,066	$	12,967	$	3,714

	For the Three Months Ended, June 30, 2017
		Type of Modification
	Number of Contracts	Extend Maturity		Modify Rate		Modify Payments		Total Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Specific Reserve
	(dollars in thousands)
Commercial, financial, agricultural and other	3	$	6,768	$	1,745	$	—	$	8,513	$	6,385	$	960
Residential real estate	5	—		85		108		193		189		4
Commercial real estate	1	—		—		68		68		68		—
Loans to individuals	4	—		3		17		20		17		—
Total	13	$	6,768	$	1,833	$	193	$	8,794	$	6,659	$	964

Troubled Debt Restructuring Subsequent Default [Table Text Block]

A troubled debt restructuring is considered to be in default when a restructured loan is 90 days or more past due. The following table provides information related to loans that were restructured within the past twelve months and that were considered to be in default during the six months endedJune 30:

	2018			2017
	Number of Contracts	Recorded Investment		Number of Contracts	Recorded Investment
	(dollars in thousands)
Commercial, financial, agricultural and other	1	$	302	—	$	—
Residential real estate	—	$	—	4	$	103
Total	1	$	302	4	$	103

The following table provides information related to loans that were restructured within the past twelve months and that were considered to be in default during the three months endedJune 30:

	2018			2017
	Number of Contracts	Recorded Investment		Number of Contracts	Recorded Investment
	(dollars in thousands)
Residential real estate	—	$	—	4	$	103
Total	—	$	—	4	$	103

Allowance for Credit Losses

he following tables provide detail related to the allowance for credit losses:

	For the Six Months Ended June 30, 2018
	Commercial, financial, agricultural and other			Real estate construction			Residential real estate			Commercial real estate			Loans to individuals			Total
	(dollars in thousands)
Allowance for credit losses:
Originated loans:
Beginning balance	$	23,418		$	1,349		$	2,753		$	17,328		$	3,404		$	48,252
Charge-offs	(861		)	—			(681		)	(2,411		)	(2,245		)	(6,198		)
Recoveries	618			1			196			87			307			1,209
Provision (credit)	1,907			(88		)	1,288			2,727			2,061			7,895
Ending balance	25,082			1,262			3,556			17,731			3,527			51,158
Acquired loans:
Beginning balance	11			—			6			29			—			46
Charge-offs	(93		)	—			(48		)	—			(11		)	(152		)
Recoveries	18			6			50			—			12			86
Provision (credit)	87			(6		)	119			(23		)	(1		)	176
Ending balance	23			—			127			6			—			156
Total ending balance	$	25,105		$	1,262		$	3,683		$	17,737		$	3,527		$	51,314
Ending balance: individually evaluated for impairment	$	6,597		$	—		$	342		$	662		$	—		$	7,601
Ending balance: collectively evaluated for impairment	18,508			1,262			3,341			17,075			3,527			43,713
Loans:
Ending balance	1,130,638			259,825			1,518,850			2,172,615			558,178			5,640,106
Ending balance: individually evaluated for impairment	21,087			—			5,175			9,037			—			35,299
Ending balance: collectively evaluated for impairment	1,109,551			259,825			1,513,675			2,163,578			558,178			5,604,807

	For the Six Months Ended June 30, 2017
	Commercial, financial, agricultural and other			Real estate construction			Residential real estate			Commercial real estate			Loans to individuals			Total
	(dollars in thousands)
Allowance for credit losses:
Originated loans:
Beginning balance	$	35,974		$	577		$	2,492		$	6,619		$	4,504		$	50,166
Charge-offs	(5,277		)	—			(610		)	(60		)	(2,170		)	(8,117		)
Recoveries	3,636			96			192			146			248			4,318
Provision (credit)	(961		)	95			42			602			1,750			1,528
Ending balance	33,372			768			2,116			7,307			4,332			47,895
Acquired loans:
Beginning balance	—			—			19			—			—			19
Charge-offs	—			—			(9		)	—			(8		)	(17		)
Recoveries	—			1			27			4			46			78
Provision (credit)	118			(1		)	(33		)	46			(38		)	92
Ending balance	118			—			4			50			—			172
Total ending balance	$	33,490		$	768		$	2,120		$	7,357		$	4,332		$	48,067
Ending balance: individually evaluated for impairment	$	1,791		$	—		$	35		$	309		$	—		$	2,135
Ending balance: collectively evaluated for impairment	31,699			768			2,085			7,048			4,332			45,932
Loans:
Ending balance	1,199,800			249,255			1,416,926			1,963,001			545,800			5,374,782
Ending balance: individually evaluated for impairment	16,917			—			6,978			8,697			—			32,592
Ending balance: collectively evaluated for impairment	1,182,883			249,255			1,409,948			1,954,304			545,800			5,342,190

	For the Three Months Ended June 30, 2018
	Commercial, financial, agricultural and other			Real estate construction		Residential real estate			Commercial real estate			Loans to individuals			Total
	(dollars in thousands)
Allowance for credit losses:
Originated loans:
Beginning balance	$	27,532		$	1,114	$	3,141		$	18,494		$	3,416		$	53,697
Charge-offs	(571		)	—		(226		)	(2,243		)	(1,076		)	(4,116		)
Recoveries	362			—		121			18			112			613
Provision (credit)	(2,241		)	148		520			1,462			1,075			964
Ending balance	25,082			1,262		3,556			17,731			3,527			51,158
Acquired loans:
Beginning balance	20			—		13			2			—			35
Charge-offs	(93		)	—		(32		)	—			(7		)	(132		)
Recoveries	11			—		33			—			5			49
Provision (credit)	85			—		113			4			2			204
Ending balance	23			—		127			6			—			156
Total ending balance	$	25,105		$	1,262	$	3,683		$	17,737		$	3,527		$	51,314

	For the Three Months Ended, June 30, 2017
	Commercial, financial, agricultural and other			Real estate construction			Residential real estate			Commercial real estate			Loans to individuals			Total
	(dollars in thousands)
Allowance for credit losses:
Originated loans:
Beginning balance	$	34,701		$	614		$	2,414		$	6,582		$	4,334		$	48,645
Charge-offs	(1,452		)	—			(145		)	(29		)	(972		)	(2,598		)
Recoveries	3,268			42			70			29			120			3,529
Provision (credit)	(3,145		)	112			(223		)	725			850			(1,681		)
Ending balance	33,372			768			2,116			7,307			4,332			47,895
Acquired loans:
Beginning balance	—			—			31			—			—			31
Charge-offs	—			—			(1		)	—			(1		)	(2		)
Recoveries	—			1			21			4			45			71
Provision (credit)	118			(1		)	(47		)	46			(44		)	72
Ending balance	118			—			4			50			—			172
Total ending balance	$	33,490		$	768		$	2,120		$	7,357		$	4,332		$	48,067