Summary Of Significant Accounting Policies	9 Months Ended
Sep. 30, 2011
Summary Of Significant Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Centrue Financial Corporation is a bank holding company organized under the laws of the State of Delaware. When we use the terms "Centrue," the "Company," "we," "us," and "our," we mean Centrue Financial Corporation, a Delaware Corporation, and its consolidated subsidiaries. When we use the term the "Bank," we are referring to our wholly owned banking subsidiary, Centrue Bank. The Company and the Bank provide a full range of banking services to individual and corporate customers located in markets extending from the far western and southern suburbs of the Chicago metropolitan area across Central Illinois down to the metropolitan St. Louis area. These services include demand, time, and savings deposits; business and consumer lending; and mortgage banking. Additionally, brokerage, asset management, and trust services are provided to our customers on a referral basis to third party providers. The Company is subject to competition from other financial institutions and nonfinancial institutions providing financial services. Additionally, the Company and the Bank are subject to regulations of certain regulatory agencies and undergo periodic examinations by those regulatory agencies. Basis of presentation The accounting and reporting policies of the Company and its subsidiaries conform to U.S. generally accepted accounting principles ("GAAP") and general practice within the banking industry. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates which are particularly susceptible to significant change in the near term relate to the fair value of investment securities and other-than-temporary impairment of securities, the determination of the allowance for loan losses and valuation of other real estate owned. For further information with respect to significant accounting policies followed by the Company in the preparation of its consolidated financial statements, refer to the Company's Annual Report on Form 10-K for the year ended December 31, 2010. The consolidated financial statements include the accounts of the Company and Centrue Bank. Intercompany balances and transactions have been eliminated in consolidation and certain 2010 amounts have been reclassified to conform to the 2011 presentation. The annualized results of operations during the three and nine months ended September 30, 2011 are not necessarily indicative of the results expected for the year ending December 31, 2011. All financial information in the following tables is in thousands (000s), except share and per share data. In the opinion of management, all normal and recurring adjustments which are necessary to fairly present the results for the interim periods presented have been included.

Summary Of Significant Accounting Policies

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

Note 1. Summary of Significant Accounting Policies

Centrue Financial Corporation is a bank holding company organized under the laws of the State of Delaware. When we use the terms "Centrue," the "Company," "we," "us," and "our," we mean Centrue Financial Corporation, a Delaware Corporation, and its consolidated subsidiaries. When we use the term the "Bank," we are referring to our wholly owned banking subsidiary, Centrue Bank. The Company and the Bank provide a full range of banking services to individual and corporate customers located in markets extending from the far western and southern suburbs of the Chicago metropolitan area across Central Illinois down to the metropolitan St. Louis area. These services include demand, time, and savings deposits; business and consumer lending; and mortgage banking. Additionally, brokerage, asset management, and trust services are provided to our customers on a referral basis to third party providers. The Company is subject to competition from other financial institutions and nonfinancial institutions providing financial services. Additionally, the Company and the Bank are subject to regulations of certain regulatory agencies and undergo periodic examinations by those regulatory agencies.

Basis of presentation

The accounting and reporting policies of the Company and its subsidiaries conform to U.S. generally accepted accounting principles ("GAAP") and general practice within the banking industry. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates which are particularly susceptible to significant change in the near term relate to the fair value of investment securities and other-than-temporary impairment of securities, the determination of the allowance for loan losses and valuation of other real estate owned.

For further information with respect to significant accounting policies followed by the Company in the preparation of its consolidated financial statements, refer to the Company's Annual Report on Form 10-K for the year ended December 31, 2010. The consolidated financial statements include the accounts of the Company and Centrue Bank. Intercompany balances and transactions have been eliminated in consolidation and certain 2010 amounts have been reclassified to conform to the 2011 presentation. The annualized results of operations during the three and nine months ended September 30, 2011 are not necessarily indicative of the results expected for the year ending December 31, 2011. All financial information in the following tables is in thousands (000s), except share and per share data. In the opinion of management, all normal and recurring adjustments which are necessary to fairly present the results for the interim periods presented have been included.