Allowance for Probable Loan Losses (Tables)

3 Months Ended

Mar. 31, 2017

Allowance for Probable Loan Losses

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

	Three Months Ended March 31, 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		(2,735)		—		—		—		(31)		(105)		(121)		—		(2,992)
Recoveries credited to allowance		699		1		58		—		5		24		16		14		817
Net (losses) recoveries  charged to allowance		(2,036)		1		58		—		(26)		(81)		(105)		14		(2,175)
Provision charged to operations		2,240		(101)		(68)		12		(38)		(449)		78		26		1,700
Balance at March 31,	$	25,853	$	13,789	$	16,721	$	818	$	2,391	$	3,186	$	504	$	924	$	64,186

	Three Months Ended March 31, 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		(19,071)		—		(47)		(180)		(7)		(169)		(101)		—		(19,575)
Recoveries credited to allowance		5,143		4		11		—		3		38		37		1		5,237
Net (losses) recoveries  charged to allowance		(13,928)		4		(36)		(180)		(4)		(131)		(64)		1		(14,338)
Provision charged to operations		18,280		(3,054)		(2,759)		(158)		(1,136)		(1,770)		(44)		(225)		9,134
Balance at March 31,	$	25,783	$	10,870	$	16,974	$	910	$	2,369	$	3,420	$	530	$	928	$	61,784

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

	March 31, 2017
	Loans Individually				Loans Collectively
	Evaluated For				Evaluated For
	Impairment				Impairment
	Recorded				Recorded
	Investment		Allowance		Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	21,336	$	277	$	842,857	$	25,576
Commercial real estate: other construction & land development		3,587		319		1,774,695		13,470
Commercial real estate: farmland & commercial		7,997		863		1,949,675		15,858
Commercial real estate: multifamily		532		—		144,566		818
Residential: first lien		6,590		44		411,944		2,347
Residential: junior lien		968		—		627,513		3,186
Consumer		1,246		—		52,368		504
Foreign		757		—		162,872		924
Total	$	43,013	$	1,503	$	5,966,490	$	62,683

	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

	March 31, 2017		December 31, 2016
	(Dollars in Thousands)
Domestic
Commercial	$	21,294	$	22,369
Commercial real estate: other construction & land development		3,587		4,776
Commercial real estate: farmland & commercial		5,532		8,314
Commercial real estate: multifamily		532		552
Residential: first lien		424		655
Residential: junior lien		166		166
Consumer		42		26
Foreign		390		387
Total non-accrual loans	$	31,967	$	37,245

Impaired loans, by loan class

	March 31, 2017
			Unpaid				Average
	Recorded		Principal		Related		Recorded		Interest
	Investment		Balance		Allowance		Investment		Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	1,159	$	2,288	$	278	$	1,165	$	—
Commercial real estate: other construction & land development		970		986		319		1,299		—
Commercial real estate: farmland & commercial		1,325		2,465		863		1,820		—
Residential:  first lien		62		62		44		62		—
Total impaired loans with related allowance	$	3,516	$	5,801	$	1,504	$	4,346	$	—

	March 31, 2017
			Unpaid		Average
	Recorded		Principal		Recorded		Interest
	Investment		Balance		Investment		Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	20,177	$	47,901	$	20,789	$	1
Commercial real estate: other construction & land development		2,617		2,705		2,683		—
Commercial real estate: farmland & commercial		6,672		7,529		6,751		28
Commercial real estate: multifamily		532		547		539		—
Residential: first lien		6,528		6,605		6,558		79
Residential: junior lien		968		992		972		12
Consumer		1,246		1,246		1,246		—
Foreign		757		757		748		4
Total impaired loans with no related allowance	$	39,497	$	68,282	$	40,286	$	124

	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 March 31, 2016:

	March 31, 2016
		Quarter to Date
	Average
	Recorded		Interest
	Investment		Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	4,017	$	—
Commercial real estate: other construction & land development		165		—
Commercial real estate: farmland & commercial		6,120		26
Total impaired loans with related allowance	$	10,302	$	26

	March 31, 2016
	Quarter to Date
	Average
	Recorded		Interest
	Investment		Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	21,051	$	1
Commercial real estate: other construction & land development		6,296		25
Commercial real estate: farmland & commercial		7,590		—
Commercial real estate: multifamily		168		—
Residential: first lien		6,340		71
Residential: junior lien		1,036		15
Consumer		1,210		—
Foreign		747		4
Total impaired loans with no related allowance	$	44,438	$	116

Loans accounted for as trouble debt restructuring, by loan class

	March 31, 2017		December 31, 2016
		(Dollars in Thousands)
Domestic
Commercial	$	10,113	$	10,710
Commercial real estate:  other construction & land development		—		—
Commercial real estate:  farmland & commercial		3,055		3,086
Residential:  first lien		6,166		6,181
Residential:  junior lien		803		812
Consumer		1,204		1,269
Foreign		367		360
Total troubled debt restructuring	$	21,708	$	22,418

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

	March 31, 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	$	3,048	$	796	$	20,604	$	781	$	24,448	$	839,745	$	864,193
Commercial real estate: other construction & land development		2,659		375		1,693		6		4,727		1,773,555		1,778,282
Commercial real estate: farmland & commercial		1,406		1,290		6,233		3,104		8,929		1,948,743		1,957,672
Commercial real estate: multifamily		—		—		532		—		532		144,566		145,098
Residential: first lien		2,960		933		4,677		4,296		8,570		409,964		418,534
Residential: junior lien		739		30		500		343		1,269		627,212		628,481
Consumer		516		94		367		329		977		52,637		53,614
Foreign		2,832		638		512		122		3,982		159,647		163,629
Total past due loans	$	14,160	$	4,156	$	35,118	$	8,981	$	53,434	$	5,956,069	$	6,009,503

	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

			March 31, 2017
			Special		Watch		Watch List—		Watch List—
	Pass		Review		List—Pass		Substandard		Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	688,694	$	35,310	$	38,253	$	80,600	$	21,336
Commercial real estate: other construction & land development		1,711,225		923		—		62,547		3,587
Commercial real estate: farmland & commercial		1,809,418		7,496		59,718		73,043		7,997
Commercial real estate: multifamily		144,566		—		—		—		532
Residential: first lien		411,333		44		—		567		6,590
Residential: junior lien		627,363		150		—		—		968
Consumer		52,368		—		—		—		1,246
Foreign		162,872		—		—		—		757
Total	$	5,607,839	$	43,923	$	97,971	$	216,757	$	43,013

			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