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Allowance for Probable Loan Losses (Tables)

3 Months Ended

Mar. 31, 2018

Allowance for Probable Loan Losses

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

		Three Months Ended March 31, 2018
		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,		$	27,905		$	11,675		$	16,663		$	1,109		$	2,950		$	6,103		$	440		$	842		$	67,687
Losses charged to allowance			(2,715)			(1)			—			—			(14)			(30)			(117)			—			(2,877)
Recoveries credited to allowance			583			2			18			—			1			66			12			—			682
Net (losses) recoveries  charged to allowance			(2,132)			1			18			—			(13)			36			(105)			—			(2,195)
Provision charged to operations			(5,082)			122			8,122			(162)			69			(1,450)			102			(59)			1,662
Balance at March 31,		$	20,691		$	11,798		$	24,803		$	947		$	3,006		$	4,689		$	437		$	783		$	67,154

		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

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

		March 31, 2018
		Loans Individually						Loans Collectively
		Evaluated For						Evaluated For
		Impairment						Impairment
		Recorded						Recorded
		Investment			Allowance			Investment			Allowance
		(Dollars in Thousands)
Domestic
Commercial		$	18,384		$	471		$	1,104,712		$	20,220
Commercial real estate: other construction & land development			2,415			116			1,723,214			11,682
Commercial real estate: farmland & commercial			36,570			8,323			2,055,269			16,480
Commercial real estate: multifamily			470			—			178,846			947
Residential: first lien			6,747			—			420,932			3,006
Residential: junior lien			704			—			700,551			4,689
Consumer			1,205			—			45,573			437
Foreign			338			—			157,173			783
Total		$	66,833		$	8,910		$	6,386,270		$	58,244

		December 31, 2017
		Loans Individually						Loans Collectively
		Evaluated For						Evaluated For
		Impairment						Impairment
		Recorded						Recorded
		Investment			Allowance			Investment			Allowance
		(Dollars in Thousands)
Domestic
Commercial		$	17,947		$	300		$	1,068,520		$	27,605
Commercial real estate: other construction & land development			2,455			116			1,681,095			11,559
Commercial real estate: farmland & commercial			33,123			18			2,010,162			16,645
Commercial real estate: multifamily			476			—			192,440			1,109
Residential: first lien			6,852			—			425,925			2,950
Residential: junior lien			723			—			700,025			6,103
Consumer			1,281			—			48,262			440
Foreign			347			—			158,539			842
Total		$	63,204		$	434		$	6,284,968		$	67,253

Loans accounted on non-accrual basis, by loan class

		March 31, 2018			December 31, 2017
		(Dollars in Thousands)
Domestic
Commercial		$	18,347		$	17,909
Commercial real estate: other construction & land development			2,415			2,455
Commercial real estate: farmland & commercial			36,570			33,123
Commercial real estate: multifamily			470			476
Residential: first lien			773			712
Residential: junior lien			3			11
Consumer			48			44
Foreign			—			—
Total non-accrual loans		$	58,626		$	54,730

Impaired loans, by loan class

		March 31, 2018
					Unpaid						Average
		Recorded			Principal			Related			Recorded			Interest
		Investment			Balance			Allowance			Investment			Recognized
		(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial		$	1,708		$	1,992		$	471		$	1,717		$	—
Commercial real estate: other construction & land development			144			169			116			144			—
Commercial real estate: farmland & commercial			15,100			15,260			8,323			15,103			—
Total impaired loans with related allowance		$	16,952		$	17,421		$	8,910		$	16,964		$	—

		March 31, 2018
					Unpaid			Average
		Recorded			Principal			Recorded			Interest
		Investment			Balance			Investment			Recognized
		(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial		$	16,675		$	44,200		$	16,820		$	1
Commercial real estate: other construction & land development			2,271			2,451			2,284			—
Commercial real estate: farmland & commercial			21,471			22,107			21,488			—
Commercial real estate: multifamily			470			501			471			—
Residential: first lien			6,747			6,868			6,960			77
Residential: junior lien			704			715			708			10
Consumer			1,205			1,208			1,208			1
Foreign			338			338			341			4
Total impaired loans with no related allowance		$	49,881		$	78,388		$	50,280		$	93

		December 31, 2017
					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		$	1,300		$	1,577		$	300			1,346			—
Commercial real estate: farmland & commercial			145			169			116			150			—
Commercial real estate: multifamily			449			590			18			489			—
Total impaired loans with related allowance		$	1,894		$	2,336		$	434		$	1,985		$	—

		December 31, 2017
					Unpaid			Average
		Recorded			Principal			Recorded			Interest
		Investment			Balance			Investment			Recognized
		(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial		$	16,646		$	44,095		$	19,615		$	3
Commercial real estate: other construction & land development			2,310			2,455			3,493			—
Commercial real estate: farmland & commercial			32,675			33,275			38,536			—
Commercial real estate: multifamily			476			505			511			—
Residential: first lien			6,852			6,968			7,249			324
Residential: junior lien			723			736			970			45
Consumer			1,281			1,283			1,293			3
Foreign			347			347			750			16
Total impaired loans with no related allowance		$	61,310		$	89,664		$	72,417		$	391

The following table details key information regarding the Company’s impaired loans by loan class at March 31, 2017:

		March 31, 2017
		Average
		Recorded			Interest
		Investment			Recognized
		(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial		$	1,165		$	—
Commercial real estate: other construction & land development			1,299			—
Commercial real estate: farmland & commercial			1,820			—
Commercial real estate: first lien			62			—
Total impaired loans with related allowance		$	4,346		$	—

		March 31, 2017
		Quarter to Date
		Average
		Recorded			Interest
		Investment			Recognized
		(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial		$	20,789		$	1
Commercial real estate: other construction & land development			2,683			—
Commercial real estate: farmland & commercial			6,751			28
Commercial real estate: multifamily			539			—
Residential: first lien			6,558			79
Residential: junior lien			972			12
Consumer			1,246			—
Foreign			748			4
Total impaired loans with no related allowance		$	40,286		$	124

Loans accounted for as trouble debt restructuring, by loan class

		March 31, 2018			December 31, 2017
			(Dollars in Thousands)
Domestic
Commercial		$	6,742		$	6,910
Commercial real estate:  farmland & commercial			1,389			—
Residential:  first lien			5,974			6,140
Residential:  junior lien			701			712
Consumer			1,157			1,237
Foreign			338			347
Total troubled debt restructuring		$	16,301		$	15,346

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

		March 31, 2018
											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		$	2,492		$	894		$	18,571		$	962		$	21,957		$	1,101,139		$	1,123,096
Commercial real estate: other construction & land development			964			5,034			1,025			211			7,023			1,718,606			1,725,629
Commercial real estate: farmland & commercial			4,415			2,525			30,410			646			37,350			2,054,489			2,091,839
Commercial real estate: multifamily			175			—			507			37			682			178,634			179,316
Residential: first lien			2,466			1,097			5,120			4,917			8,683			418,996			427,679
Residential: junior lien			1,184			202			797			793			2,183			699,072			701,255
Consumer			767			65			69			47			901			45,877			46,778
Foreign			2,825			315			574			574			3,714			153,797			157,511
Total past due loans		$	15,288		$	10,132		$	57,073		$	8,187		$	82,493		$	6,370,610		$	6,453,103

		December 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		$	3,790		$	398		$	18,308		$	537		$	22,496		$	1,063,971		$	1,086,467
Commercial real estate: other construction & land development			354			308			820			6			1,482			1,682,068			1,683,550
Commercial real estate: farmland & commercial			3,925			518			31,133			954			35,576			2,007,709			2,043,285
Commercial real estate: multifamily			84			—			476			—			560			192,356			192,916
Residential: first lien			4,295			2,458			4,095			3,861			10,848			421,929			432,777
Residential: junior lien			1,310			580			1,110			1,099			3,000			697,748			700,748
Consumer			868			98			160			133			1,126			48,417			49,543
Foreign			1,229			69			667			667			1,965			156,921			158,886
Total past due loans		$	15,855		$	4,429		$	56,769		$	7,257		$	77,053		$	6,271,119		$	6,348,172

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

					March 31, 2018
					Special			Watch			Watch List—			Watch List—
		Pass			Review			List—Pass			Substandard			Impaired
					(Dollars in Thousands)
Domestic
Commercial		$	970,585		$	—		$	1,299		$	132,828		$	18,384
Commercial real estate: other construction & land development			1,658,783			3,532			667			60,232			2,415
Commercial real estate: farmland & commercial			1,851,726			61,413			45,022			97,108			36,570
Commercial real estate: multifamily			177,894			—			952			—			470
Residential: first lien			420,060			38			127			707			6,747
Residential: junior lien			699,567			984			—			—			704
Consumer			45,573			—			—			—			1,205
Foreign			157,173			—			—			—			338
Total		$	5,981,361		$	65,967		$	48,067		$	290,875		$	66,833

					December 31, 2017
					Special			Watch			Watch List—			Watch List—
		Pass			Review			List—Pass			Substandard			Impaired
					(Dollars in Thousands)
Domestic
Commercial		$	905,707		$	—		$	3,170		$	159,643		$	17,947
Commercial real estate: other construction & land development			1,616,604			1,288			672			62,531			2,455
Commercial real estate: farmland & commercial			1,863,763			5,134			41,820			99,445			33,123
Commercial real estate: multifamily			192,440			—			—			—			476
Residential: first lien			425,811			40			—			74			6,852
Residential: junior lien			699,875			150			—			—			723
Consumer			48,262			—			—			—			1,281
Foreign			158,539			—			—			—			347
Total		$	5,911,001		$	6,612		$	45,662		$	321,693		$	63,204

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Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account.

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Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.

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Tabular disclosure of financing receivables that are past due but not impaired, financing receivables that are 90 days past due and still accruing, and financing receivables on nonaccrual status.

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Tabular disclosure of the activity in the total allowance for credit losses related to financing receivables (such as loans or lease receivables) for entities that have an unclassified balance sheet, including the balance in the allowance at the beginning and end of each period, additions charged to operations, direct write-downs charged against the allowance, and recoveries of amounts previously charged off.

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