Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Ratio	0.121	0.119
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100
Tier 1 Capital to Risk Weighted Assets, Ratio	0.103	0.100
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080
Common Equity Tier 1 capital to risk weighted assets	0.094	0.091
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065
Tier 1 Leverage Ratio	0.093	0.088
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050
Lake Forest Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 852,471	$ 725,384
Total Capital to Risk Weighted Assets, Ratio	0.125	0.114
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 683,460	$ 638,871
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 804,011	$ 689,320
Tier 1 Capital to Risk Weighted Assets, Ratio	0.118	0.108
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 546,768	$ 511,097
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 804,011	$ 689,320
Common Equity Tier 1 capital to risk weighted assets	0.118	0.108
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 444,249	$ 415,266
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 804,011	$ 689,320
Tier 1 Leverage Ratio	0.099	0.088
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 404,942	$ 391,452
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Hinsdale Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 478,606	$ 441,317
Total Capital to Risk Weighted Assets, Ratio	0.118	0.117
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 407,428	$ 378,007
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 447,075	$ 416,762
Tier 1 Capital to Risk Weighted Assets, Ratio	0.110	0.110
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 325,943	$ 302,406
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 447,075	$ 416,762
Common Equity Tier 1 capital to risk weighted assets	0.110	0.110
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 264,828	$ 245,705
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 447,075	$ 416,762
Tier 1 Leverage Ratio	0.094	0.095
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 238,724	$ 220,373
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Wintrust Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 1,115,527	$ 1,084,435
Total Capital to Risk Weighted Assets, Ratio	0.119	0.120
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 938,320	$ 907,101
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 1,009,631	$ 1,004,271
Tier 1 Capital to Risk Weighted Assets, Ratio	0.108	0.111
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 750,656	$ 725,681
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 1,009,631	$ 1,004,271
Common Equity Tier 1 capital to risk weighted assets	0.108	0.111
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 609,908	$ 589,616
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 1,009,631	$ 1,004,271
Tier 1 Leverage Ratio	0.108	0.107
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 467,712	$ 469,415
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Libertyville Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 272,241	$ 242,482
Total Capital to Risk Weighted Assets, Ratio	0.123	0.120
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 221,509	$ 201,695
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 253,576	$ 225,766
Tier 1 Capital to Risk Weighted Assets, Ratio	0.115	0.112
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 177,207	$ 161,356
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 253,576	$ 225,766
Common Equity Tier 1 capital to risk weighted assets	0.115	0.112
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 143,981	$ 131,102
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 253,576	$ 225,766
Tier 1 Leverage Ratio	0.097	0.093
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 130,396	$ 121,475
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Barrington Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 431,663	$ 387,113
Total Capital to Risk Weighted Assets, Ratio	0.116	0.115
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 372,989	$ 337,499
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 416,070	$ 373,830
Tier 1 Capital to Risk Weighted Assets, Ratio	0.112	0.111
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 298,392	$ 269,999
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 416,070	$ 373,830
Common Equity Tier 1 capital to risk weighted assets	0.112	0.111
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 242,443	$ 219,374
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 416,070	$ 373,830
Tier 1 Leverage Ratio	0.108	0.103
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 192,589	$ 181,212
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Crystal Lake Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 181,916	$ 154,891
Total Capital to Risk Weighted Assets, Ratio	0.127	0.114
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 143,786	$ 136,419
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 170,670	$ 145,514
Tier 1 Capital to Risk Weighted Assets, Ratio	0.119	0.107
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 115,029	$ 109,135
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 170,670	$ 145,514
Common Equity Tier 1 capital to risk weighted assets	0.119	0.107
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 93,461	$ 88,673
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 170,670	$ 145,514
Tier 1 Leverage Ratio	0.100	0.095
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 85,280	$ 76,780
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Northbrook Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 474,973	$ 409,571
Total Capital to Risk Weighted Assets, Ratio	0.123	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 385,619	$ 362,342
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 441,563	$ 383,691
Tier 1 Capital to Risk Weighted Assets, Ratio	0.115	0.106
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 308,496	$ 289,874
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 441,563	$ 383,691
Common Equity Tier 1 capital to risk weighted assets	0.115	0.106
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 250,653	$ 235,522
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 441,563	$ 383,691
Tier 1 Leverage Ratio	0.099	0.091
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 222,668	$ 211,521
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Schaumburg Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 203,127	$ 169,428
Total Capital to Risk Weighted Assets, Ratio	0.113	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 179,670	$ 149,425
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 190,280	$ 160,061
Tier 1 Capital to Risk Weighted Assets, Ratio	0.106	0.107
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 143,736	$ 119,540
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 190,280	$ 160,061
Common Equity Tier 1 capital to risk weighted assets	0.106	0.107
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 116,786	$ 97,126
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 190,280	$ 160,061
Tier 1 Leverage Ratio	0.094	0.093
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 101,620	$ 86,409
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Village Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 278,437	$ 256,537
Total Capital to Risk Weighted Assets, Ratio	0.119	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 233,112	$ 226,399
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 255,649	$ 238,246
Tier 1 Capital to Risk Weighted Assets, Ratio	0.110	0.105
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 186,489	$ 181,120
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 255,649	$ 238,246
Common Equity Tier 1 capital to risk weighted assets	0.110	0.105
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 151,523	$ 147,160
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 255,649	$ 238,246
Tier 1 Leverage Ratio	0.098	0.097
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 129,995	$ 123,484
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Beverly Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 239,374	$ 223,808
Total Capital to Risk Weighted Assets, Ratio	0.115	0.115
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 207,604	$ 195,237
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 221,548	$ 206,714
Tier 1 Capital to Risk Weighted Assets, Ratio	0.107	0.106
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 166,083	$ 156,189
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 221,548	$ 206,714
Common Equity Tier 1 capital to risk weighted assets	0.107	0.106
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 134,942	$ 126,904
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 221,548	$ 206,714
Tier 1 Leverage Ratio	0.100	0.100
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 110,741	$ 103,759
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Town Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 352,266	$ 314,351
Total Capital to Risk Weighted Assets, Ratio	0.117	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 301,424	$ 278,704
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 334,086	$ 297,499
Tier 1 Capital to Risk Weighted Assets, Ratio	0.111	0.107
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 241,139	$ 222,963
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 334,086	$ 297,499
Common Equity Tier 1 capital to risk weighted assets	0.111	0.107
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 195,926	$ 181,157
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 334,086	$ 297,499
Tier 1 Leverage Ratio	0.091	0.084
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 183,077	$ 176,660
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Wheaton Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 317,491	$ 285,606
Total Capital to Risk Weighted Assets, Ratio	0.115	0.116
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 275,018	$ 247,015
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 296,134	$ 269,366
Tier 1 Capital to Risk Weighted Assets, Ratio	0.108	0.109
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 220,014	$ 197,612
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 296,134	$ 269,366
Common Equity Tier 1 capital to risk weighted assets	0.108	0.109
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 178,762	$ 160,559
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 296,134	$ 269,366
Tier 1 Leverage Ratio	0.094	0.090
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 157,056	$ 148,942
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
State Bank of the Lakes
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 197,243	$ 167,023
Total Capital to Risk Weighted Assets, Ratio	0.119	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 165,218	$ 147,369
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 189,197	$ 159,399
Tier 1 Capital to Risk Weighted Assets, Ratio	0.115	0.108
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 132,174	$ 117,895
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 189,197	$ 159,399
Common Equity Tier 1 capital to risk weighted assets	0.115	0.108
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 107,392	$ 95,790
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 189,197	$ 159,399
Tier 1 Leverage Ratio	0.099	0.091
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 95,551	$ 88,065
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
Old Plank Trail Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 240,694	$ 211,437
Total Capital to Risk Weighted Assets, Ratio	0.113	0.115
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 212,258	$ 183,269
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 227,759	$ 201,864
Tier 1 Capital to Risk Weighted Assets, Ratio	0.107	0.110
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 169,806	$ 146,615
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 227,759	$ 201,864
Common Equity Tier 1 capital to risk weighted assets	0.107	0.110
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 137,968	$ 119,125
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 227,759	$ 201,864
Tier 1 Leverage Ratio	0.090	0.087
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 127,250	$ 115,692
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050
St. Charles Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets):	$ 250,964	$ 211,132
Total Capital to Risk Weighted Assets, Ratio	0.115	0.113
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 218,403	$ 186,623
Total Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.100	0.100
Tier 1 Capital (to Risk Weighted Assets):	$ 233,651	$ 200,910
Tier 1 Capital to Risk Weighted Assets, Ratio	0.107	0.108
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 174,722	$ 149,299
Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.080	0.080
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount	$ 233,651	$ 200,910
Common Equity Tier 1 capital to risk weighted assets	0.107	0.108
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Amount	$ 141,962	$ 121,305
Common Equity Tier 1 Capital to Risk Weighted Assets, To Be Well Capitalized by Regulatory Definition, Ratio	0.065	0.065
Tier 1 Leverage Ratio, Amount	$ 233,651	$ 200,910
Tier 1 Leverage Ratio	0.095	0.096
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Amount	$ 122,638	$ 104,431
Tier 1 Leverage Ratio, To Be Well Capitalized by Regulatory Definition, Ratio	0.050	0.050