Loans (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Composition Of Loan Portfolio

The following table presents the Company's loans held-for-investment by class.

Loan Portfolio

(Dollar amounts in thousands)

	As of December 31,
	2020		2019
Commercial and industrial	$	4,578,254	$	4,481,525
Agricultural	364,038		405,616
Commercial real estate:
Office, retail, and industrial	1,861,768		1,848,718
Multi-family	872,813		856,553
Construction	612,611		593,093
Other commercial real estate	1,481,976		1,383,708
Total commercial real estate	4,829,168		4,682,072
Total corporate loans, excluding Paycheck Protection Program ("PPP") loans	9,771,460		9,569,213
PPP loans	785,563		—
Total corporate loans	10,557,023		9,569,213
Home equity	761,725		851,454
1-4 family mortgages	3,022,413		1,927,078
Installment	410,071		492,585
Total consumer loans	4,194,209		3,271,117
Total loans	$	14,751,232	$	12,840,330
Deferred loan fees included in total loans	$	9,696	$	7,972
Overdrawn demand deposits included in total loans	8,444		10,675

Schedule of Financial Instruments Owned and Pledged as Collateral

The carrying values of loans that were pledged to secure liabilities as of December 31, 2020 and 2019 are presented below.

Carrying Value of Loans Pledged

(Dollar amounts in thousands)

	As of December 31
	2020		2019
Loans pledged to secure:
FHLB advances (blanket pledge)	$	5,909,052	$	5,371,872
FRB's Discount Window Primary Credit Program	1,207,676		1,173,250
Total	$	7,116,728	$	6,545,122

Schedule of Loans Sold

The following table presents loan sales and purchases for the years ended December 31, 2020, 2019, and 2018.

Loan Sales and Purchases

(Dollar amounts in thousands)

	As of December 31,
	2020		2019		2018
Corporate loan sales
Proceeds from sales	$	4,990	$	14,650	$	17,900
Less book value of loans sold	4,876		14,149		17,498
Net gains on corporate sales(1)	114		501		402
1-4 family mortgage loan sales
Proceeds from sales	835,688		474,384		245,967
Less book value of loans sold	812,696		464,893		240,807
Net gains on 1-4 family mortgage sales(2)	22,992		9,491		5,160
Total net gains on loan sales	$	23,106	$	9,992	$	5,562
Corporate loan purchases(3)
Commercial and industrial	$	273,245	$	368,533	$	627,045
Office, retail, and industrial	17,128		4,787		9,500
Multi-family	—		—		25,097
Construction	10,694		17,372		50,376
Other commercial real estate	15,000		24,559		36,312
Total corporate loan purchases	$	316,067	$	415,251	$	748,330
Consumer loan purchases
Home equity	$	144,967	$	149,379	$	131,767
1-4 family mortgages	1,150,414		834,473		131,993
Total consumer loan purchases	$	1,295,381	$	983,852	$	263,760

(1)Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Consolidated Statements of Income.

(2)Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Consolidated Statements of Income.

(3)Consists of the Company's portion of loan participations purchased.