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Income Taxes - Narrative Tax Carryforwards (Details) $ in Millions	Dec. 31, 2018 USD ($)
Alternative Minimum Tax Carryforward Axis [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 3.1
Internal Revenue Service (IRS) [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	1.2
Tax credit carryforward	1.3
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	58.5
Downers Grove National Bank [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 7.5

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
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+ References

No definition available.

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