Loans (Tables)

3 Months Ended

Mar. 31, 2021

Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]

Analysis of Loan Portfolio by Major Types of Loans

The Company’s loan portfolio includes originated and purchased loans. The following is an analysis of the loan portfolio by segment and class (net of unearned income):

	March 31, 2021		December 31, 2020
	(dollars in thousands)
Commercial loans:
Commercial real estate	$	4,081,915	$	4,062,313
Commercial business	3,792,813		3,597,968
Agriculture	751,800		779,627
Construction	282,534		268,663
Consumer loans:
One-to-four family residential real estate	735,314		683,570
Other consumer	31,942		35,519
Total loans	9,676,318		9,427,660
Less: Allowance for credit losses	(148,294)		(149,140)
Total loans, net	$	9,528,024	$	9,278,520

Analysis of the Aged Loan Portfolio

The following is an aging of the recorded investment of the loan portfolio at the dates presented:

	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
March 31, 2021	(in thousands)
Commercial loans:
Commercial real estate	$	4,067,718	$	880	$	6,000	$	—	$	6,880	$	7,317	$	4,081,915
Commercial business	3,778,955		109		198		—		307		13,551		3,792,813
Agriculture	739,599		1,060		512		—		1,572		10,629		751,800
Construction	282,343		—		—		—		—		191		282,534
Consumer loans:
One-to-four family residential real estate	728,053		5,462		48		—		5,510		1,751		735,314
Other consumer	31,758		27		15		—		42		142		31,942
Total	$	9,628,426	$	7,538	$	6,773	$	—	$	14,311	$	33,581	$	9,676,318
	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	4,037,309	$	17,292	$	—	—		$	17,292	$	7,712	$	4,062,313
Commercial business	3,578,905		1,282		4,559		—		5,841		13,222		3,597,968
Agriculture	767,102		911		—		—		911		11,614		779,627
Construction	268,304		—		142		—		142		217		268,663
Consumer loans:
One-to-four family residential real estate	677,627		2,283		1,659		—		3,942		2,001		683,570
Other consumer	35,450		24		5		—		29		40		35,519
Total	$	9,364,697	$	21,792	$	6,365	$	—	$	28,157	$	34,806	$	9,427,660

Interest written off on nonaccrual loans

The following table summarizes written-off interest on nonaccrual loans for the periods indicated:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Commercial loans	$	211	$	783
Consumer loans	7		5
Total	$	218	$	788

Analysis of Nonaccrual Loans

The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL for the periods indicated:

	March 31, 2021		December 31, 2020
	(in thousands)
Commercial loans:
Commercial real estate	$	6,336	$	6,393
Commercial business	8,682		6,382
Agriculture	8,379		8,136
Total	$	23,397	$	20,911

Analysis of loans classified as Troubled Debt Restructurings (“TDR”)

The following is an analysis of loans classified as TDR for the periods indicated:

	Three Months Ended March 31, 2021					Three Months Ended March 31, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial real estate	1	$	628	$	628	—	$	—	$	—
Commercial business	7	843		843		2	272		272
Agriculture	—	—		—		1	895		895
Consumer loans:
One-to-four family residential real estate	2	140		140		1	68		68
Total	10	$	1,611	$	1,611	4	$	1,235	$	1,235