Regulatory Matters (Schedule of Actual Capital Amounts and Ratios) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Ratio (as a percent)	12.00%	11.90%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	9.90%	9.70%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	9.40%	8.60%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%
Tier 1 Leverage Ratio (as a percent)	9.30%	8.90%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%
Lake Forest Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 366,407	$ 348,058
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.60%	11.70%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 317,180	$ 296,573
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 347,924	$ 331,883
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.00%	11.20%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 253,744	$ 237,259
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 347,924	$ 331,883
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.00%	11.20%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 206,167	$ 192,773
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 347,924	$ 331,883
Tier 1 Leverage Ratio (as a percent)	10.30%	9.60%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 168,865	$ 172,160
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Hinsdale Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 224,577	$ 211,605
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.50%	11.70%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 195,125	$ 180,470
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 214,061	$ 201,353
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.00%	11.20%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 156,100	$ 144,376
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 214,061	$ 201,353
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.00%	11.20%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 126,831	$ 117,305
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 214,061	$ 201,353
Tier 1 Leverage Ratio (as a percent)	10.20%	10.10%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 105,086	$ 100,006
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Wintrust Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 512,581	$ 441,330
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.20%	11.20%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 456,230	$ 393,081
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 439,061	$ 375,907
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	9.60%	9.60%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 364,984	$ 314,464
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 439,061	$ 375,907
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	9.60%	9.60%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 296,549	$ 255,502
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 439,061	$ 375,907
Tier 1 Leverage Ratio (as a percent)	9.20%	9.20%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 237,782	$ 204,994
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Libertyville Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 141,723	$ 133,571
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	11.40%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 124,637	$ 117,620
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 134,310	$ 126,387
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.80%	10.70%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 99,709	$ 94,096
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 134,310	$ 126,387
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.80%	10.70%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 81,014	$ 76,453
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 134,310	$ 126,387
Tier 1 Leverage Ratio (as a percent)	9.80%	9.70%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 68,404	$ 65,318
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Barrington Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 234,930	$ 205,766
Total Capital to Risk Weighted Assets, Ratio (as a percent)	12.00%	11.50%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 195,409	$ 178,846
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 229,311	$ 198,545
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.70%	11.10%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 156,327	$ 143,077
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 229,311	$ 198,545
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.70%	11.10%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 127,016	$ 116,250
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 229,311	$ 198,545
Tier 1 Leverage Ratio (as a percent)	11.80%	10.00%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 97,007	$ 99,722
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Crystal Lake Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 95,532	$ 93,905
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.30%	11.80%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 84,664	$ 79,829
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 91,273	$ 89,700
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.80%	11.20%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 67,731	$ 63,863
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 91,273	$ 89,700
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.80%	11.20%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 55,031	$ 51,889
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 91,273	$ 89,700
Tier 1 Leverage Ratio (as a percent)	9.50%	9.40%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 48,069	$ 47,575
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Northbrook Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 222,441	$ 190,853
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	11.10%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 194,764	$ 171,647
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 198,628	$ 167,721
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.20%	9.80%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 155,811	$ 105,760
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 198,628	$ 167,721
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.20%	9.80%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 126,597	$ 85,930
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 198,628	$ 167,721
Tier 1 Leverage Ratio (as a percent)	9.50%	8.90%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 104,377	$ 94,466
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Schaumburg Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 111,772	$ 106,108
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.90%	11.50%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 93,752	$ 92,496
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 105,733	$ 100,854
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.30%	10.90%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 75,001	$ 73,997
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 105,733	$ 100,854
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.30%	10.90%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 60,939	$ 60,123
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 105,733	$ 100,854
Tier 1 Leverage Ratio (as a percent)	10.10%	10.00%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 52,171	$ 50,643
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Village Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 145,517	$ 136,958
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.90%	11.20%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 121,867	$ 122,125
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 136,807	$ 127,028
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.20%	10.40%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 97,494	$ 97,700
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 136,807	$ 127,028
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.20%	10.40%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 79,214	$ 79,381
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 136,807	$ 127,028
Tier 1 Leverage Ratio (as a percent)	9.70%	9.10%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 70,182	$ 69,511
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Beverly Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 132,516	$ 115,638
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.70%	11.40%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 112,810	$ 101,235
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 127,561	$ 111,281
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.30%	11.00%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 90,248	$ 80,988
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 127,561	$ 111,281
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.30%	11.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 73,327	$ 65,802
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 127,561	$ 111,281
Tier 1 Leverage Ratio (as a percent)	10.80%	10.10%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 59,140	$ 55,002
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Town Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 188,987	$ 181,907
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	11.30%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 166,253	$ 161,492
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 180,943	$ 174,234
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.90%	10.80%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 133,003	$ 129,194
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 180,943	$ 174,234
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.90%	10.80%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 108,065	$ 104,970
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 180,943	$ 174,234
Tier 1 Leverage Ratio (as a percent)	10.10%	9.50%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 89,617	$ 91,558
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Wheaton Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 151,141	$ 130,255
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	11.30%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 132,211	$ 114,887
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 135,009	$ 112,664
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.20%	9.80%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 105,769	$ 91,910
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 135,009	$ 112,664
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.20%	9.80%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 85,937	$ 74,677
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 135,009	$ 112,664
Tier 1 Leverage Ratio (as a percent)	9.40%	8.80%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 72,152	$ 64,361
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
State Bank of the Lakes
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 105,770	$ 97,196
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	11.50%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 92,518	$ 84,880
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 95,520	$ 86,092
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	10.30%	10.10%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 74,014	$ 67,904
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 95,520	$ 86,092
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	10.30%	10.10%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 60,137	$ 55,172
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 95,520	$ 86,092
Tier 1 Leverage Ratio (as a percent)	9.20%	8.70%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 51,681	$ 49,446
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
Old Plank Trail Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 145,272	$ 127,868
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.60%	11.20%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 125,642	$ 114,021
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 139,366	$ 122,067
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.10%	10.70%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 100,514	$ 91,216
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 139,366	$ 122,067
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.10%	10.70%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 81,667	$ 74,113
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 139,366	$ 122,067
Tier 1 Leverage Ratio (as a percent)	9.90%	9.30%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 70,735	$ 65,293
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%
St. Charles Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Amount	$ 105,778	$ 109,345
Total Capital to Risk Weighted Assets, Ratio (as a percent)	11.40%	12.00%
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 92,582	$ 91,188
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets, Amount	$ 102,251	$ 104,843
Tier 1 Capital to Risk Weighted Assets, Ratio (as a percent)	11.00%	11.50%
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 74,066	$ 72,950
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 102,251	$ 104,843
Common Equity Tier 1 Capital to Risk Weighted Assets (as a percent)	11.00%	11.50%
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 60,178	$ 59,272
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	6.50%	6.50%
Tier 1 Leverage Ratio, Amount	$ 102,251	$ 104,843
Tier 1 Leverage Ratio (as a percent)	9.80%	11.20%
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 51,907	$ 46,641
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio (as a percent)	5.00%	5.00%