Allowance for Probable Loan Losses (Tables)

9 Months Ended

Sep. 30, 2017

Allowance for Probable Loan Losses

Summary of the transactions in the allowance for probable loan losses by loan class

	Three Months Ended September 30, 2017
	Domestic														Foreign
			Commercial
			Real Estate:
			Other		Commercial
			Construction &		Real Estate:		Commercial
			Land		Farmland &		Real Estate:		Residential:		Residential:
	Commercial		Development		Commercial		Multifamily		First Lien		Junior Lien		Consumer		Foreign		Total
	(Dollars in Thousands)
Balance at June 30,	$	25,140	$	13,249	$	17,472	$	997	$	2,314	$	4,357	$	488	$	902	$	64,919
Losses charged to allowance		(4,249)		(213)		—		—		(16)		(202)		(63)		—		(4,743)
Recoveries credited to allowance		631		17		341		—		—		85		6		5		1,085
Net (losses) recoveries  charged to allowance		(3,618)		(196)		341		—		(16)		(117)		(57)		5		(3,658)
Provision charged (credited) to operations		5,473		(1,168)		371		—		817		995		82		21		6,591
Balance at September 30,	$	26,995	$	11,885	$	18,184	$	997	$	3,115	$	5,235	$	513	$	928	$	67,852

	Three Months Ended September 30, 2016
	Domestic														Foreign
			Commercial
			Real Estate:
			Other		Commercial
			Construction &		Real Estate:		Commercial
			Land		Farmland &		Real Estate:		Residential:		Residential:
	Commercial		Development		Commercial		Multifamily		First Lien		Junior Lien		Consumer		Foreign		Total
	(Dollars in Thousands)
Balance at June 30,	$	25,982	$	11,109	$	16,942	$	855	$	2,277	$	3,400	$	532	$	936	$	62,033
Losses charged to allowance		(3,485)		(14)		(497)		—		(27)		—		(124)		(41)		(4,188)
Recoveries credited to allowance		791		6,073		512		—		11		74		11		—		7,472
Net (losses) recoveries charged to allowance		(2,694)		6,059		15		—		(16)		74		(113)		(41)		3,284
Provision charged (credited)to operations		2,602		(4,659)		291		(65)		126		221		98		39		(1,347)
Balance at September 30,	$	25,890	$	12,509	$	17,248	$	790	$	2,387	$	3,695	$	517	$	934	$	63,970

	Nine Months Ended September 30, 2017
	Domestic														Foreign
			Commercial
			Real Estate:
			Other		Commercial
			Construction &		Real Estate:		Commercial
			Land		Farmland &		Real Estate:		Residential:		Residential:
	Commercial		Development		Commercial		Multifamily		First Lien		Junior Lien		Consumer		Foreign		Total
	(Dollars in Thousands)
Balance at December 31,	$	25,649	$	13,889	$	16,731	$	806	$	2,455	$	3,716	$	531	$	884	$	64,661
Losses charged to allowance		(9,248)		(213)		(40)		—		(77)		(340)		(223)		—		(10,141)
Recoveries credited to allowance		3,484		20		488		—		7		182		35		20		4,236
Net (losses) recoveries  charged to allowance		(5,764)		(193)		448		—		(70)		(158)		(188)		20		(5,905)
Provision charged (credited) to operations		7,110		(1,811)		1,005		191		730		1,677		170		24		9,096
Balance at September 30,	$	26,995	$	11,885	$	18,184	$	997	$	3,115	$	5,235	$	513	$	928	$	67,852

	Nine Months Ended September 30, 2016
	Domestic														Foreign
			Commercial
			Real Estate:
			Other		Commercial
			Construction &		Real Estate:		Commercial
			Land		Farmland &		Real Estate:		Residential:		Residential:
	Commercial		Development		Commercial		Multifamily		First Lien		Junior Lien		Consumer		Foreign		Total
	(Dollars in Thousands)
Balance at December 31,	$	21,431	$	13,920	$	19,769	$	1,248	$	3,509	$	5,321	$	638	$	1,152	$	66,988
Losses charged to allowance		(27,952)		(16)		(2,387)		(180)		(57)		(324)		(341)		(41)		(31,298)
Recoveries credited to allowance		6,447		6,080		598		—		18		188		53		12		13,396
Net (losses) recoveries  charged to allowance		(21,505)		6,064		(1,789)		(180)		(39)		(136)		(288)		(29)		(17,902)
Provision charged (credited) to operations		25,964		(7,475)		(732)		(278)		(1,083)		(1,490)		167		(189)		14,884
Balance at September 30,	$	25,890	$	12,509	$	17,248	$	790	$	2,387	$	3,695	$	517	$	934	$	63,970

Loans individually or collectively evaluated for their impairment and related allowance, by loan class

	September 30, 2017
	Loans Individually				Loans Collectively
	Evaluated For				Evaluated For
	Impairment				Impairment
	Recorded				Recorded
	Investment		Allowance		Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	20,193	$	300	$	1,008,849	$	26,695
Commercial real estate: other construction & land development		2,428		116		1,702,376		11,769
Commercial real estate: farmland & commercial		5,966		18		1,969,876		18,166
Commercial real estate: multifamily		496		—		166,881		997
Residential: first lien		6,651		—		421,204		3,115
Residential: junior lien		762		—		679,754		5,235
Consumer		1,318		—		52,641		513
Foreign		355		—		162,515		928
Total	$	38,169	$	434	$	6,164,096	$	67,418

	December 31, 2016
	Loans Individually				Loans Collectively
	Evaluated For				Evaluated For
	Impairment				Impairment
	Recorded				Recorded
	Investment		Allowance		Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	22,412	$	—	$	887,255	$	25,649
Commercial real estate: other construction & land development		4,776		371		1,712,099		13,518
Commercial real estate: farmland & commercial		10,810		546		1,932,260		16,185
Commercial real estate: multifamily		552		—		139,914		806
Residential: first lien		6,836		44		415,068		2,411
Residential: junior lien		978		—		609,340		3,716
Consumer		1,295		—		53,873		531
Foreign		746		—		166,474		884
Total	$	48,405	$	961	$	5,916,283	$	63,700

Loans accounted on non-accrual basis, by loan class

	September 30, 2017		December 31, 2016
	(Dollars in Thousands)
Domestic
Commercial	$	20,152	$	22,369
Commercial real estate: other construction & land development		2,428		4,776
Commercial real estate: farmland & commercial		5,966		8,314
Commercial real estate: multifamily		496		552
Residential: first lien		464		655
Residential: junior lien		12		166
Consumer		52		26
Foreign		—		387
Total non-accrual loans	$	29,570	$	37,245

Impaired loans, by loan class

	September 30, 2017
							Quarter to Date				Year to Date
			Unpaid				Average				Average
	Recorded		Principal		Related		Recorded		Interest		Recorded		Interest
	Investment		Balance		Allowance		Investment		Recognized		Investment		Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	1,760	$	3,865	$	300	$	2,215	$	—	$	2,439	$	—
Commercial real estate: other construction & land development		148		169		116		149		—		151		—
Commercial real estate: farmland & commercial		500		590		18		500		—		496		—
Total impaired loans with related allowance	$	2,408	$	4,624	$	434	$	2,864	$	—	$	3,086	$	—

	September 30, 2017
					Quarter to Date				Year to Date
			Unpaid		Average				Average
	Recorded		Principal		Recorded		Interest		Recorded		Interest
	Investment		Balance		Investment		Recognized		Investment		Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	18,433	$	45,878	$	18,547	$	1	$	18,931	$	2
Commercial real estate: other construction & land development		2,280		2,397		2,296		—		3,456		—
Commercial real estate: farmland & commercial		5,466		6,235		7,936		21		9,456		79
Commercial real estate: multifamily		496		518		502		—		521		—
Residential: first lien		6,651		6,765		6,733		81		6,903		241
Residential: junior lien		762		774		765		11		975		35
Consumer		1,318		1,319		1,317		2		1,278		2
Foreign		355		355		759		4		753		12
Total impaired loans with no related allowance	$	35,761	$	64,241	$	38,855	$	120	$	42,273	$	371

	December 31, 2016
			Unpaid				Average
	Recorded		Principal		Related		Recorded		Interest
	Investment		Balance		Allowance		Investment		Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial real estate: other construction & land development	$	1,958	$	1,971	$	371	$	2,512	$	—
Commercial real estate: farmland & commercial		2,808		3,948		546		3,247		—
Commercial real estate: multifamily		62		62		44		62		—
Total impaired loans with related allowance	$	4,828	$	5,981	$	961	$	5,821	$	—

	December 31, 2016
			Unpaid		Average
	Recorded		Principal		Recorded		Interest
	Investment		Balance		Investment		Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	21,412	$	50,737	$	19,354	$	3
Commercial real estate: other construction & land development		2,818		4,419		2,336		67
Commercial real estate: farmland & commercial		8,002		9,054		8,523		110
Commercial real estate: multifamily		552		562		401		—
Residential: first lien		6,774		6,847		6,860		298
Residential: junior lien		978		1,017		1,011		52
Consumer		1,295		1,295		1,214		1
Foreign		746		746		751		16
Total impaired loans with no related allowance	$	42,577	$	74,677	$	40,450	$	547

The following table details key information regarding the Company’s impaired loans by loan class at September 30, 2016:

	September 30, 2016
	Quarter to Date					Year to Date
	Average				Average
	Recorded		Interest		Recorded		Interest
	Investment		Recognized		Investment		Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	2,247	$	—	$	3,239	$	—
Commercial real estate: other construction & land development		159		—		162		—
Commercial real estate: farmland & commercial		5,036		24		5,639		73
Total impaired loans with related allowance	$	7,442	$	24	$	9,040	$	73

	September 30, 2016
	Quarter to Date				Year to Date
	Average				Average
	Recorded		Interest		Recorded		Interest
	Investment		Recognized		Investment		Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	13,813	$	1	$	15,234	$	3
Commercial real estate: other construction & land development		3,924		14		4,927		53
Commercial real estate: farmland & commercial		5,513		3		6,469		10
Commercial real estate: multifamily		577		—		349		—
Residential: first lien		6,712		75		6,644		220
Residential: junior lien		1,012		12		1,011		39
Consumer		1,229		—		1,191		1
Foreign		752		4		752		12
Total impaired loans with no related allowance	$	33,532	$	109	$	36,577	$	338

Loans accounted for as trouble debt restructuring, by loan class

	September 30, 2017		December 31, 2016
		(Dollars in Thousands)
Domestic
Commercial	$	9,072	$	10,710
Commercial real estate:  farmland & commercial		590		3,086
Residential:  first lien		6,187		6,181
Residential:  junior lien		750		812
Consumer		1,266		1,269
Foreign		355		360
Total troubled debt restructuring	$	18,220	$	22,418

Information regarding the aging of past due loans, by loan class

	September 30, 2017
							90 Days or		Total
	30 - 59		60 - 89		90 Days or		greater &		Past				Total
	Days		Days		Greater		still accruing		Due		Current		Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	3,604	$	352	$	20,248	$	706	$	24,204	$	1,004,837	$	1,029,041
Commercial real estate: other construction & land development		444		—		864		49		1,308		1,703,496		1,704,804
Commercial real estate: farmland & commercial		9,117		29,568		4,062		676		42,747		1,933,095		1,975,842
Commercial real estate: multifamily		149		—		496		—		645		166,732		167,377
Residential: first lien		3,161		964		4,651		4,382		8,776		419,079		427,855
Residential: junior lien		1,369		420		682		682		2,471		678,045		680,516
Consumer		713		124		553		523		1,390		52,569		53,959
Foreign		1,468		267		262		262		1,997		160,873		162,870
Total past due loans	$	20,025	$	31,695	$	31,818	$	7,280	$	83,538	$	6,118,726	$	6,202,264

	December 31, 2016
							90 Days or		Total
	30 - 59		60 - 89		90 Days or		greater &		Past				Total
	Days		Days		Greater		still accruing		Due		Current		Portfolio
		(Dollars in Thousands)
Domestic
Commercial	$	4,081	$	829	$	21,123	$	392	$	26,033	$	883,634	$	909,667
Commercial real estate: other construction & land development		1,502		396		4,456		9		6,354		1,710,521		1,716,875
Commercial real estate: farmland & commercial		3,454		3,054		6,150		289		12,658		1,930,412		1,943,070
Commercial real estate: multifamily		44		—		552		—		596		139,870		140,466
Residential: first lien		5,615		1,350		4,143		3,756		11,108		410,796		421,904
Residential: junior lien		762		178		540		382		1,480		608,838		610,318
Consumer		910		95		413		387		1,418		53,750		55,168
Foreign		931		425		397		11		1,753		165,467		167,220
Total past due loans	$	17,299	$	6,327	$	37,774	$	5,226	$	61,400	$	5,903,288	$	5,964,688

Summary of the loan portfolio by credit quality indicator, by loan class

			September 30, 2017
			Special		Watch		Watch List—		Watch List—
	Pass		Review		List—Pass		Substandard		Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	855,329	$	52	$	3,128	$	150,339	$	20,193
Commercial real estate: other construction & land development		1,638,432		912		—		63,032		2,428
Commercial real estate: farmland & commercial		1,799,806		10,608		36,800		122,662		5,966
Commercial real estate: multifamily		166,881		—		—		—		496
Residential: first lien		420,606		41		—		557		6,651
Residential: junior lien		679,604		150		—		—		762
Consumer		52,641		—		—		—		1,318
Foreign		162,515		—		—		—		355
Total	$	5,775,814	$	11,763	$	39,928	$	336,590	$	38,169

			December 31, 2016
			Special		Watch		Watch List—		Watch List—
	Pass		Review		List—Pass		Substandard		Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	720,350	$	90,746	$	1,121	$	75,038	$	22,412
Commercial real estate: other construction & land development		1,648,633		1,986		—		61,480		4,776
Commercial real estate: farmland & commercial		1,792,542		7,983		59,872		71,863		10,810
Commercial real estate: multifamily		139,914		—		—		—		552
Residential: first lien		413,638		814		—		616		6,836
Residential: junior lien		609,190		150		—		—		978
Consumer		53,873		—		—		—		1,295
Foreign		166,474		—		—		—		746
Total	$	5,544,614	$	101,679	$	60,993	$	208,997	$	48,405