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Business Combinations Estimated Fair Values Of Assets Acquired And Liabilities Assumed (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 08, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2016 | Aug. 14, 2015
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  |  | $ 279,468,000
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | (152,397,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  |  |  |  | 4,422,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  | 14,274,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  | 6,216,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  |  |  |  | 1,174,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  |  |  | 457,951,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | 453,647,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities |  |  |  |  | 507,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  |  | 457,951,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase |  |  |  |  | 3,797,000
OldNationalBankBranches [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  | $ 2,700,000 |
Goodwill, Acquired During Period |  |  | $ 14,274,000 |  |
Business Combination, Acquisition Related Costs |  |  |  | $ 1,400,000 |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 10 years |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  | $ 3,270,000 |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  | $ (228,380) |
First Clover Leaf [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | $ 59,320,000 |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (109,174,000) |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (438,265,000) |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | 0 |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (1,987,000) |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 11,581,000 |  |  |  |
Goodwill, Acquired During Period | 16,785,000 | $ 16,785,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 4,660,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | 27,133,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 668,905,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | 536,686,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 2,103,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 580,434,000 |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 10 years |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 88,471,000 |  |  |  |
Aggregate Total Of Cash Paid In Business Combination | 22,545,000 |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned | 65,926,000 |  |  |  |
Business Combination, Value of Total Consideration Paid | 88,471,000 |  |  |  |
Business Acquisition, Transaction Costs |  |  |  | $ 1,340,000 |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  | 7,417,000 |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 23,263,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | 15,113,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures | (3,269,000) |  |  |  |
Acquired Book Value [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | (155,774,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  |  |  |  | 4,547,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  |  |  |  | 1,433,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  |  |  | 441,222,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | 452,810,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities |  |  |  |  | 507,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  |  | 457,114,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase |  |  |  |  | 3,797,000
Acquired Book Value [Member] | OldNationalBankBranches [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  |  | 279,468,000
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  | (156,000,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  | 453,000,000 |
Acquired Book Value [Member] | First Clover Leaf [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 59,320,000 |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (109,911,000) |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (448,668,000) |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | (6,928,000) |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (2,741,000) |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 9,618,000 |  |  |  |
Goodwill, Acquired During Period | 11,385,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 99,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | 23,974,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 658,788,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | 534,692,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 2,103,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 579,058,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 79,730,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 23,263,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | 15,000,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures | (4,000,000) |  |  |  |
Fair Value Adjustments [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | 3,377,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  |  |  |  | (125,000)
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  | 14,274,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  | 6,216,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  |  |  |  | (259,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  |  |  | 16,729,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | 837,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  |  | 837,000
Fair Value Adjustments [Member] | OldNationalBankBranches [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | (3,377,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  | 6,216,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  |  |  |  | 259,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | $ 837,000
Fair Value Adjustments [Member] | First Clover Leaf [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 0 |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (737,000) |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (10,403,000) |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | (6,928,000) |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (754,000) |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 1,963,000 |  |  |  |
Goodwill, Acquired During Period | 5,400,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 4,561,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | 3,159,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 10,117,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | 1,994,000 |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 0 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 1,376,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 8,741,000 |  |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  | $ 2,514,000 |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 0 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | 113,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures | (731,000) |  |  |  |
Fair Value Adjustments, Accretable portion [Member] | First Clover Leaf [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | $ (8,400,000) |  |  |  |

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- Definition Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses + References No definition available. + Details
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- Definition Business Combination: Approximate Deposits to be acquired + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures + References No definition available. + Details
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- Definition Approximate amount of loans to acquired in Business Combination + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities + References No definition available. + Details
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- Definition Business Combination, Value of Total Consideration Paid + References No definition available. + Details
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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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