Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2023

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Compliance with Minimum Capital Requirements

As reflected in the following table, the Company met all minimum capital requirements at December 31, 2023 and 2022:

	2023		2022
Total capital to risk weighted assets	12.1	%	11.9	%
Tier 1 capital to risk weighted assets	10.3		10.0
Common Equity Tier 1 capital to risk weighted assets	9.4		9.1
Tier 1 Leverage Ratio	9.3		8.8

Schedule of Actual Capital Amounts and Ratios

The banks’ actual capital amounts and ratios as of December 31, 2023 and 2022 are presented in the following table:

	December 31, 2023								December 31, 2022
	Actual				To Be Well Capitalized by Regulatory Definition				Actual				To Be Well Capitalized by Regulatory Definition
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to Risk Weighted Assets):
Lake Forest Bank	$	852,471	12.5	%	$	683,460	10.0	%	$	725,384	11.4	%	$	638,871	10.0	%
Hinsdale Bank	478,606		11.8		407,428		10.0		441,317		11.7		378,007		10.0
Wintrust Bank	1,115,527		11.9		938,320		10.0		1,084,435		12.0		907,101		10.0
Libertyville Bank	272,241		12.3		221,509		10.0		242,482		12.0		201,695		10.0
Barrington Bank	431,663		11.6		372,989		10.0		387,113		11.5		337,499		10.0
Crystal Lake Bank	181,916		12.7		143,786		10.0		154,891		11.4		136,419		10.0
Northbrook Bank	474,973		12.3		385,619		10.0		409,571		11.3		362,342		10.0
Schaumburg Bank	203,127		11.3		179,670		10.0		169,428		11.3		149,425		10.0
Village Bank	278,437		11.9		233,112		10.0		256,537		11.3		226,399		10.0
Beverly Bank	239,374		11.5		207,604		10.0		223,808		11.5		195,237		10.0
Town Bank	352,266		11.7		301,424		10.0		314,351		11.3		278,704		10.0
Wheaton Bank	317,491		11.5		275,018		10.0		285,606		11.6		247,015		10.0
State Bank of the Lakes	197,243		11.9		165,218		10.0		167,023		11.3		147,369		10.0
Old Plank Trail Bank	240,694		11.3		212,258		10.0		211,437		11.5		183,269		10.0
St. Charles Bank	250,964		11.5		218,403		10.0		211,132		11.3		186,623		10.0
Tier 1 Capital (to Risk Weighted Assets):
Lake Forest Bank	$	804,011	11.8	%	$	546,768	8.0	%	$	689,320	10.8	%	$	511,097	8.0	%
Hinsdale Bank	447,075		11.0		325,943		8.0		416,762		11.0		302,406		8.0
Wintrust Bank	1,009,631		10.8		750,656		8.0		1,004,271		11.1		725,681		8.0
Libertyville Bank	253,576		11.5		177,207		8.0		225,766		11.2		161,356		8.0
Barrington Bank	416,070		11.2		298,392		8.0		373,830		11.1		269,999		8.0
Crystal Lake Bank	170,670		11.9		115,029		8.0		145,514		10.7		109,135		8.0
Northbrook Bank	441,563		11.5		308,496		8.0		383,691		10.6		289,874		8.0
Schaumburg Bank	190,280		10.6		143,736		8.0		160,061		10.7		119,540		8.0
Village Bank	255,649		11.0		186,489		8.0		238,246		10.5		181,120		8.0
Beverly Bank	221,548		10.7		166,083		8.0		206,714		10.6		156,189		8.0
Town Bank	334,086		11.1		241,139		8.0		297,499		10.7		222,963		8.0
Wheaton Bank	296,134		10.8		220,014		8.0		269,366		10.9		197,612		8.0
State Bank of the Lakes	189,197		11.5		132,174		8.0		159,399		10.8		117,895		8.0
Old Plank Trail Bank	227,759		10.7		169,806		8.0		201,864		11.0		146,615		8.0
St. Charles Bank	233,651		10.7		174,722		8.0		200,910		10.8		149,299		8.0
Common Equity Tier 1 Capital (to Risk Weighted Assets):
Lake Forest Bank	$	804,011	11.8	%	$	444,249	6.5	%	$	689,320	10.8	%	$	415,266	6.5	%
Hinsdale Bank	447,075		11.0		264,828		6.5		416,762		11.0		245,705		6.5
Wintrust Bank	1,009,631		10.8		609,908		6.5		1,004,271		11.1		589,616		6.5
Libertyville Bank	253,576		11.5		143,981		6.5		225,766		11.2		131,102		6.5
Barrington Bank	416,070		11.2		242,443		6.5		373,830		11.1		219,374		6.5
Crystal Lake Bank	170,670		11.9		93,461		6.5		145,514		10.7		88,673		6.5
Northbrook Bank	441,563		11.5		250,653		6.5		383,691		10.6		235,522		6.5
Schaumburg Bank	190,280		10.6		116,786		6.5		160,061		10.7		97,126		6.5
Village Bank	255,649		11.0		151,523		6.5		238,246		10.5		147,160		6.5
Beverly Bank	221,548		10.7		134,942		6.5		206,714		10.6		126,904		6.5
Town Bank	334,086		11.1		195,926		6.5		297,499		10.7		181,157		6.5
Wheaton Bank	296,134		10.8		178,762		6.5		269,366		10.9		160,559		6.5
State Bank of the Lakes	189,197		11.5		107,392		6.5		159,399		10.8		95,790		6.5
Old Plank Trail Bank	227,759		10.7		137,968		6.5		201,864		11.0		119,125		6.5
St. Charles Bank	233,651		10.7		141,962		6.5		200,910		10.8		121,305		6.5

	December 31, 2023								December 31, 2022
	Actual				To Be Well Capitalized by Regulatory Definition				Actual				To Be Well Capitalized by Regulatory Definition
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Tier 1 Leverage Ratio:
Lake Forest Bank	$	804,011	9.9	%	$	404,942	5.0	%	$	689,320	8.8	%	$	391,452	5.0	%
Hinsdale Bank	447,075		9.4		238,724		5.0		416,762		9.5		220,373		5.0
Wintrust Bank	1,009,631		10.8		467,712		5.0		1,004,271		10.7		469,415		5.0
Libertyville Bank	253,576		9.7		130,396		5.0		225,766		9.3		121,475		5.0
Barrington Bank	416,070		10.8		192,589		5.0		373,830		10.3		181,212		5.0
Crystal Lake Bank	170,670		10.0		85,280		5.0		145,514		9.5		76,780		5.0
Northbrook Bank	441,563		9.9		222,668		5.0		383,691		9.1		211,521		5.0
Schaumburg Bank	190,280		9.4		101,620		5.0		160,061		9.3		86,409		5.0
Village Bank	255,649		9.8		129,995		5.0		238,246		9.7		123,484		5.0
Beverly Bank	221,548		10.0		110,741		5.0		206,714		10.0		103,759		5.0
Town Bank	334,086		9.1		183,077		5.0		297,499		8.4		176,660		5.0
Wheaton Bank	296,134		9.4		157,056		5.0		269,366		9.0		148,942		5.0
State Bank of the Lakes	189,197		9.9		95,551		5.0		159,399		9.1		88,065		5.0
Old Plank Trail Bank	227,759		9.0		127,250		5.0		201,864		8.7		115,692		5.0
St. Charles Bank	233,651		9.5		122,638		5.0		200,910		9.6		104,431		5.0