Fair Value (Carrying Amounts And Estimated Fair Values Of Financial Instruments, Not Previously Presented) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Financial instruments	$ 567,708	$ 638,210	$ 582,068
Federal Home Loan Bank stock, at cost	19,673	31,937	36,090
Commercial	1,269,607	1,211,399	1,292,841
Commercial real estate	1,170,401	942,395	1,002,463
Residential real estate	795,442	664,705	427,838
Consumer credit, net of unearned income	881,891	924,952	1,007,961
Accrued interest receivable	42,600	42,971	45,187
Net loans	4,047,152	3,671,142	3,659,240
Noninterest-bearing demand deposits	1,504,632	1,276,024	1,170,196
NOW, savings and money market deposits	1,332,961	1,297,443	1,295,173
Time Deposits	1,557,978	1,475,257	1,783,437
Standby letters of credit	73,700	74,300
Federal Funds Purchased [Member] \| Carrying Value [Member] \| Short-term Borrowings [Member]
Federal Funds Purchased	1,385	1,663
Subordinated Notes [Member] \| Carrying Value [Member] \| Other Borrowings [Member]
Subordinated bank notes	13,000
Junior Subordinated Debenture [Member] \| Carrying Value [Member] \| Other Borrowings [Member]
Junior subordinated debenture	16,000	8,000
Repurchase Agreements [Member] \| Carrying Value [Member] \| Short-term Borrowings [Member]
Repurchase agreements	294,709	287,414
Repurchase Agreements [Member] \| Carrying Value [Member] \| Other Borrowings [Member]
Repurchase agreements	50,000	50,000
Other Short-Term Borrowings [Member] \| Carrying Value [Member] \| Short-term Borrowings [Member]
Other Short-term Borrowings	9,111	9,155
Federal Home Loan Bank Advances [Member] \| Carrying Value [Member] \| Other Borrowings [Member]
Federal Home Loan Bank Advances	211,316	211,696
Subordinated Bank Notes [Member] \| Carrying Value [Member] \| Other Borrowings [Member]
Subordinated bank notes	150,000	150,000
Carrying Value [Member]
Cash, due from banks, federal funds sold and money market investments	335,617	251,552
Federal Home Loan Bank stock, at cost	19,673	31,937
Commercial	1,243,578	1,185,194
Commercial real estate	1,137,911	909,742
Residential real estate	792,330	662,396
Consumer credit, net of unearned income	873,333	913,810
Accrued interest receivable	42,600	42,971
Noninterest-bearing demand deposits	1,504,632	1,276,024
NOW, savings and money market deposits	2,952,477	2,711,644
Time Deposits	1,557,978	1,475,257
Carrying Value [Member] \| U.S. Government-Sponsored Entities And Agencies [Member]
Financial instruments	245,301	303,265
Carrying Value [Member] \| Mortgage-Backed Securities - Agency [Member]
Financial instruments	98,374	117,013
Carrying Value [Member] \| Other Borrowings [Member] \| Capital Lease Obligations [Member]
Capital Lease Obligations	4,284	4,307
Carrying Value [Member] \| Other Borrowings [Member] \| Accrued Interest Payable [Member]
Accrued interest payable	7,914	7,860
Carrying Value [Member] \| Other Borrowings [Member] \| Standby Letters Of Credit [Member]
Standby letters of credit	533	518
Carrying Value [Member] \| Commitments To Extend Credit [Member]
Off-Balance Sheet Financial Instruments	0	0
Carrying Value [Member] \| States And Political Subdivisions [Member]
Financial instruments	216,894	217,381
Carrying Value [Member] \| Other Securities [Member]
Financial instruments	7,139	551
Federal Funds Purchased [Member] \| Fair Value [Member] \| Short-term Borrowings [Member]
Federal Funds Purchased	1,385	1,663
Subordinated Notes [Member] \| Fair Value [Member] \| Other Borrowings [Member]
Subordinated bank notes	13,325
Junior Subordinated Debenture [Member] \| Fair Value [Member] \| Other Borrowings [Member]
Junior subordinated debenture	13,173	7,998
Repurchase Agreements [Member] \| Fair Value [Member] \| Short-term Borrowings [Member]
Repurchase agreements	294,710	287,416
Repurchase Agreements [Member] \| Fair Value [Member] \| Other Borrowings [Member]
Repurchase agreements	54,246	54,104
Other Short-Term Borrowings [Member] \| Fair Value [Member] \| Short-term Borrowings [Member]
Other Short-term Borrowings	9,111	9,155
Federal Home Loan Bank Advances [Member] \| Fair Value [Member] \| Other Borrowings [Member]
Federal Home Loan Bank Advances	222,816	220,531
Subordinated Bank Notes [Member] \| Fair Value [Member] \| Other Borrowings [Member]
Subordinated bank notes	152,057	154,420
Fair Value [Member]
Cash, due from banks, federal funds sold and money market investments	335,617	251,552
Federal Home Loan Bank stock, at cost	19,673	31,937
Commercial	1,278,698	1,220,464
Commercial real estate	1,188,934	952,885
Residential real estate	856,152	710,865
Consumer credit, net of unearned income	921,174	969,263
Accrued interest receivable	42,600	42,971
Noninterest-bearing demand deposits	1,504,632	1,276,024
NOW, savings and money market deposits	2,952,477	2,711,644
Time Deposits	1,597,991	1,520,093
Fair Value [Member] \| U.S. Government-Sponsored Entities And Agencies [Member]
Financial instruments	250,308	301,809
Fair Value [Member] \| Mortgage-Backed Securities - Agency [Member]
Financial instruments	101,798	119,080
Fair Value [Member] \| Commitments To Extend Credit [Member]
Off-Balance Sheet Financial Instruments	1,463	1,311
Fair Value [Member] \| States And Political Subdivisions [Member]
Financial instruments	214,944	204,379
Fair Value [Member] \| Other Securities [Member]
Financial instruments	7,124	375
Fair Value [Member] \| Other Borrowings [Member] \| Capital Lease Obligations [Member]
Capital Lease Obligations	5,218	5,138
Fair Value [Member] \| Other Borrowings [Member] \| Accrued Interest Payable [Member]
Accrued interest payable	7,914	7,860
Fair Value [Member] \| Other Borrowings [Member] \| Standby Letters Of Credit [Member]
Standby letters of credit	533	518
Old National Bancorp [Member]
Junior subordinated debenture	$ 13,000	$ 0

Cash due from banks and money market investments

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The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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The aggregate carrying amount of all Federal Home Loan Bank loans (advances).

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Standby Letters of Credit

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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-Name Regulation S-X (SX)
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-Section 03
-Paragraph 16
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Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written.

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The amount borrowed by a bank, at the federal funds rate, from another bank to meet its reserve requirements.

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-Publisher SEC
-Name Regulation S-X (SX)
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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity; such investments are measured at amortized cost (carrying value). The held-to-maturity category is for those securities that the Entity has the positive intent and ability to hold until maturity.

+ References

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-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 4, 5

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-Paragraph 7, 8, 9, 10, 11

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid.

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-Publisher SEC
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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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-Publisher SEC
-Name Regulation S-X (SX)
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Reflects the sum of the gross carrying amounts of the various categories of unpaid loans issued to individuals to acquire goods and services. Includes credit card, automobile, boat, student and durable home appliance loans. Also includes the carrying amount of unpaid loans issued to individuals to provide financing in the legal form of a lease agreement which meets the criteria for treating the arrangement as a direct financing lease.

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- Definition

The total gross amount of money lent to individual customers including construction financing, residential mortgage loans, and home equity lines of credit.

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Reflects the aggregate carrying amount of all categories of loans and leases held in portfolio, net of unearned income and the allowance for losses on loans and leases.

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-Publisher AICPA
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Reflects the gross carrying amount of unpaid loans issued to nonfinancial and nonagricultural businesses for uses other than for real property.

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-Publisher AICPA
-Name Statement of Position (SOP)
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-Name Regulation S-X (SX)
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Reflects the sum of the gross carrying amounts of unpaid loans issued to businesses to acquire, develop, construct, improve, or refinance land or a building. Includes [but is not limited to] commercial mortgage loans, which are secured by a [legal] security interest in real property [commercial building or business real property] which thereby serves as collateral securing repayment of the loan; and construction financing, which is an obligation generally in the form of a [promissory] note, used for the funding of construction projects.

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Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits.

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-Publisher SEC
-Name Regulation S-X (SX)
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Sum of the carrying amounts at the balance sheet date of short-term borrowings not otherwise specified in the taxonomy having initial terms less than one year or the normal operating cycle, if longer.

+ References

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-Publisher SEC
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Carrying value, as of the balance sheet date, of securities purchased under agreements to repurchase where the transferor maintains effective control over the assets, accounting for them as secured debt.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 48, 100

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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-Publisher SEC
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-Name Regulation S-X (SX)
-Number 210
-Section 02
-Article 5
-Subsection 19, 20, 22

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The aggregate amount of time deposits, including certificates of deposits, individual retirement accounts and open accounts.

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-Publisher SEC
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