Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2016

Regulatory Capital Requirements [Abstract]

Consolidated Capital Ratios

As reflected in the following table, the Company met all minimum capital requirements at December 31, 2016 and 2015:

	2016		2015
Total capital to risk weighted assets	11.9	%	12.2	%
Tier 1 capital to risk weighted assets	9.7		10.0
Common Equity Tier 1 capital to risk weighted assets	8.6		8.4
Tier 1 leverage Ratio	8.9		9.1

Actual Capital Amounts And Ratios

The banks’ actual capital amounts and ratios as of December 31, 2016 and 2015 are presented in the following table:

(Dollars in thousands)	December 31, 2016								December 31, 2015
	Actual				To Be Well Capitalized by Regulatory Definition				Actual				To Be Well Capitalized by Regulatory Definition
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to Risk Weighted Assets):
Lake Forest Bank	$	348,058	11.7	%	$	296,573	10.0	%	$	272,921	10.9	%	$	251,560	10.0	%
Hinsdale Bank	211,605		11.7		180,470		10.0		200,436		12.1		165,157		10.0
Wintrust Bank	441,330		11.2		393,081		10.0		364,015		10.9		334,596		10.0
Libertyville Bank	133,571		11.4		117,620		10.0		124,665		11.5		108,619		10.0
Barrington Bank	205,766		11.5		178,846		10.0		187,062		11.3		165,810		10.0
Crystal Lake Bank	93,905		11.8		79,829		10.0		89,476		11.9		75,314		10.0
Northbrook Bank	190,853		11.1		171,647		10.0		138,890		10.5		132,200		10.0
Schaumburg Bank	106,108		11.5		92,496		10.0		78,682		10.3		76,422		10.0
Village Bank	136,958		11.2		122,125		10.0		115,043		11.0		105,027		10.0
Beverly Bank	115,638		11.4		101,235		10.0		79,843		9.6		83,442		10.0
Town Bank	181,907		11.3		161,492		10.0		159,508		12.0		133,344		10.0
Wheaton Bank	130,255		11.3		114,887		10.0		103,873		10.1		102,479		10.0
State Bank of the Lakes	97,196		11.5		84,880		10.0		85,988		10.6		80,923		10.0
Old Plank Trail Bank	127,868		11.2		114,021		10.0		110,058		11.3		97,223		10.0
St. Charles Bank	109,345		12.0		91,188		10.0		79,024		10.9		72,812		10.0
Tier 1 Capital (to Risk Weighted Assets):
Lake Forest Bank	$	331,883	11.2	%	$	237,259	8.0	%	$	256,126	10.2	%	$	201,248	8.0	%
Hinsdale Bank	201,353		11.2		144,376		8.0		191,553		11.6		132,125		8.0
Wintrust Bank	375,907		9.6		314,464		8.0		311,322		9.3		267,677		8.0
Libertyville Bank	126,387		10.7		94,096		8.0		117,965		10.9		86,895		8.0
Barrington Bank	198,545		11.1		143,077		8.0		176,489		10.6		132,648		8.0
Crystal Lake Bank	89,700		11.2		63,863		8.0		85,521		11.4		60,251		8.0
Northbrook Bank	167,721		9.8		105,760		8.0		129,514		9.8		105,760		8.0
Schaumburg Bank	100,854		10.9		73,997		8.0		71,958		9.4		61,137		8.0
Village Bank	127,028		10.4		97,700		8.0		108,221		10.3		84,021		8.0
Beverly Bank	111,281		11.0		80,988		8.0		76,708		9.2		66,754		8.0
Town Bank	174,234		10.8		129,194		8.0		153,902		11.5		106,675		8.0
Wheaton Bank	112,664		9.8		91,910		8.0		96,799		9.5		81,983		8.0
State Bank of the Lakes	86,092		10.1		67,904		8.0		76,609		9.5		64,738		8.0
Old Plank Trail Bank	122,067		10.7		91,216		8.0		100,506		10.3		77,778		8.0
St. Charles Bank	104,843		11.5		72,950		8.0		75,348		10.4		58,250		8.0
Common Equity Tier 1 Capital (to Risk Weighted Assets):
Lake Forest Bank	$	331,883	11.2	%	$	192,773	6.5	%	$	256,126	10.2	%	$	163,514	6.5	%
Hinsdale Bank	201,353		11.2		117,305		6.5		191,553		11.6		107,352		6.5
Wintrust Bank	375,907		9.6		255,502		6.5		311,322		9.3		217,488		6.5
Libertyville Bank	126,387		10.7		76,453		6.5		117,965		10.9		70,603		6.5
Barrington Bank	198,545		11.1		116,250		6.5		176,489		10.6		107,777		6.5
Crystal Lake Bank	89,700		11.2		51,889		6.5		85,521		11.4		48,954		6.5
Northbrook Bank	167,721		9.8		85,930		6.5		129,514		9.8		85,930		6.5
Schaumburg Bank	100,854		10.9		60,123		6.5		71,958		9.4		49,674		6.5
Village Bank	127,028		10.4		79,381		6.5		108,221		10.3		68,267		6.5
Beverly Bank	111,281		11.0		65,802		6.5		76,708		9.2		54,237		6.5
Town Bank	174,234		10.8		104,970		6.5		153,902		11.5		86,674		6.5
Wheaton Bank	112,664		9.8		74,677		6.5		96,799		9.5		66,611		6.5
State Bank of the Lakes	86,092		10.1		55,172		6.5		76,609		9.5		52,600		6.5
Old Plank Trail Bank	122,067		10.7		74,113		6.5		100,506		10.3		63,195		6.5
St. Charles Bank	104,843		11.5		59,272		6.5		75,348		10.4		47,328		6.5

(Dollars in thousands)	December 31, 2016								December 31, 2015
	Actual				To Be Well Capitalized by Regulatory Definition				Actual				To Be Well Capitalized by Regulatory Definition
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Tier 1 Leverage Ratio:
Lake Forest Bank	$	331,883	9.6	%	$	172,160	5.0	%	$	256,126	9.1	%	$	140,541	5.0	%
Hinsdale Bank	201,353		10.1		100,006		5.0		191,553		9.9		97,023		5.0
Wintrust Bank	375,907		9.2		204,994		5.0		311,322		8.9		174,117		5.0
Libertyville Bank	126,387		9.7		65,318		5.0		117,965		9.6		61,320		5.0
Barrington Bank	198,545		10.0		99,722		5.0		176,489		9.8		90,168		5.0
Crystal Lake Bank	89,700		9.4		47,575		5.0		85,521		9.4		45,445		5.0
Northbrook Bank	167,721		8.9		94,466		5.0		129,514		8.6		75,287		5.0
Schaumburg Bank	100,854		10.0		50,643		5.0		71,958		8.4		42,707		5.0
Village Bank	127,028		9.1		69,511		5.0		108,221		9.2		58,817		5.0
Beverly Bank	111,281		10.1		55,002		5.0		76,708		8.4		45,757		5.0
Town Bank	174,234		9.5		91,558		5.0		153,902		10.3		74,452		5.0
Wheaton Bank	112,664		8.8		64,361		5.0		96,799		8.1		59,482		5.0
State Bank of the Lakes	86,092		8.7		49,446		5.0		76,609		8.3		46,001		5.0
Old Plank Trail Bank	122,067		9.3		65,293		5.0		100,506		8.5		59,383		5.0
St. Charles Bank	104,843		11.2		46,641		5.0		75,348		9.4		39,942		5.0