Acquisition (Tables)

12 Months Ended

Dec. 31, 2022

Acquisition

Summary of acquisition

West Suburban Acquisition Summary
As of Date of Acquisition
	December 1, 2021
Assets
Cash and due from banks	$	16,794
Interest bearing deposits with financial institutions		232,880
Securities available-for-sale and held-to maturity, at fair value		1,067,517
FHLBC stock		3,340
Loans, net of allowance for credit losses Day One PCD loan adjustment		1,500,974
Premises and equipment		47,456
Other real estate owned		5,552
Core deposit intangible		14,772
Deferred tax assets		5,819
Other assets		48,838
Total assets	$	2,943,942
Liabilities
Noninterest bearing demand	$	1,070,980
Savings, NOW and money market		1,408,051
Time		215,205
Total deposits		2,694,236
Reserve for unfunded commitments		1,787
Other liabilities		20,629
Total liabilities		2,716,652
Cash consideration paid		100,679
Stock issued for acquisition		194,484
Total Liabilities Assumed and Cash and Stock Consideration Paid for Acquisition	$	3,011,815
Goodwill	$	67,873

Schedule of Purchase price of loans at acquisition

	As of
West Suburban Acquired PCD Loans	December 1, 2021
Par value of acquired loans	$	108,241
Allowance for credit losses		(12,075)
Non-credit discount		(1,723)
Purchase price of PCD loans at acquisition	$	94,443

Schedule of Unaudited Pro Forma

	Unaudited Pro Forma for the Years Ended
	2021		2020
Net interest income	$	166,495	$	165,283
Noninterest income		59,036		48,937
Net income attributable to Old Second Bancorp, Inc.		67,779		12,349

Schedule of carrying amount of acquired loans

Acquired Loan Detail	As of December 31, 2022						As of December 31, 2021
	PCD		Non-PCD		Total		PCD		Non-PCD		Total
West Suburban acquired loans	$	75,396	$	1,059,363	$	1,134,759	$	102,409	$	1,418,752	$	1,521,161
ABC Bank acquired loans		1,786		31,895		33,681		4,547		64,236		68,783
Talmer Bank acquired loans		-		15,693		15,693		-		45,858		45,858
Total acquired loans net book value	$	77,182	$	1,106,951	$	1,184,133	$	106,956	$	1,528,846	$	1,635,802
Accretion recorded on acquired loans year to date	$	848	$	4,726	$	5,574	$	401	$	565	$	966
Accretion recorded on acquired unfunded commitments year to date					$	893					$	74