Description of the Business and Basis of Presentation	9 Months Ended
Sep. 30, 2012
Description of the Business and Basis of Presentation [Abstract]
DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION	NOTE 1 — DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION Customers Bancorp, Inc. (the “Bancorp”) is a Pennsylvania corporation formed on April 7, 2010 to facilitate the reorganization of Customers Bank (the “Bank”) into a bank holding company structure. The reorganization was completed on September 17, 2011. Any financial information for periods prior to September 17, 2011 contained herein reflects that of Customers Bank as the predecessor entity. The unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial statements and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim reporting. Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations, although the Bancorp believes that the disclosures made are adequate to make the information not misleading. The Bancorp’s unaudited consolidated interim financial statements reflect all adjustments that are, in the opinion of management, necessary for fair statement of the results of interim periods presented. Certain amounts reported in the 2011 consolidated financial statements have been reclassified to conform to the 2012 presentation. These reclassifications did not significantly impact the Bancorp’s financial position or results of operations. Operating results for the three-month and nine-month periods ended September 30, 2012 are not necessarily indicative of the results that may be expected for the year ended December 31, 2012. The accounting policies of Customers Bancorp, Inc. and Subsidiaries, as applied in the consolidated interim financial statements presented herein, are substantially the same as those followed on an annual basis as disclosed on pages 80 through 90 of Customers’ Annual Report on Form 10-K for the fiscal year ended December 31, 2011. It is suggested that these financial statements be read in conjunction with the financial statements and the notes thereto included in the latest Form 10-K. In addition, the Bancorp has made accounting changes in the third quarter of 2012 that are detailed in the following section entitled “ACCOUNTING CHANGES.” The Bancorp evaluated its September 30, 2012 consolidated financial statements for subsequent events through the date the financial statements were issued. The Bancorp is not aware of any additional subsequent events which would require recognition or disclosure in the financial statements. ACCOUNTING CHANGES The Fair Value Option During the third quarter of 2012, we elected the fair value option for warehouse lending transactions documented under a Master Repurchase Agreement originated after July 1, 2012 in order to more accurately represent the short term nature of the transaction and its inherent credit risk. This adoption is in accordance with the parameters established by Accounting Standards Codification (“ASC”) 825-10-25, Financial Instruments-Overall-Recognition: The Fair Value Option. As a result of this election, new warehouse lending transactions were classified as “Loans held for sale” on the balance sheet. The interest income from the warehouse lending transactions was classified in “Interest Income – Loans receivable, taxable, including fees” on the income statement for the third quarter of 2012. As Loans Receivable, the warehouse lending transactions were accounted for on an amortized cost basis less an allowance for loan loss. An allowance for loan losses is not recorded for the warehouse lending transactions when measured at fair value since under ASC 825, the exit price (the repurchase price) for warehouse lending transactions considers the effect of expected credit losses. Change in Accounting Estimates Estimates of cash flows from purchased credit-impaired (“PCI”) loans were revised during the third quarter of 2012 due to conversion to a more sophisticated and precise loan valuation system. In accordance with the guidance in ASC 310-30, Receivables—Loans and Debt Securities Acquired with Deteriorated Credit Quality, interest income is based on an acquired loan’s expected cash flows. Acquired loans are generally assessed to be within the scope of ASC 310-30 if: (1) the asset shows evidence of having deteriorated in credit quality since it was originated, and (2) it is probable that the acquirer will be unable to collect all contractually required payments receivable. Complex models are needed to calculate loan-level and/or pool level expected cash flows in accordance with ASC 310-30. The loan data analysis provided by the new software is a more precise quantification of future cash flows than the analysis that was previously calculated manually. Conversion to the new system was completed in September 2012, and as a result, estimates of cash flows from PCI loans were revised. When converting to the new software system, we were required to calculate the estimated cash flows from the various acquisition dates of the PCI loans through the date the software was implemented as it was impracticable to perform these calculations on a monthly or quarterly basis. These changes in estimates are accounted for prospectively as a change in accounting estimate. In the third quarter of 2012, approximately $4.4 million was recognized in other non-interest income related to this change. Also during the third quarter of 2012, we performed an initial re-estimation of the cash flows for the PCI loans. The re-estimation process updates the existing loan data for current loan assumptions. As a result of the initial re-estimation an increase of $4.5 million was recorded to interest income. As required by ASC 310-30, the recorded loan balance included accrued interest receivable. Due to the higher loan balance, we evaluated the adequacy of the allowance for loan losses and determined that an additional provision for loan losses of $7.5 million was appropriate. In the future, we will re-estimate the cash flows on the PCI loans on a quarterly basis, and adjustments, if any, are not expected to have a material impact on future earnings. As a result of the changes in estimates, net income increased by $911,000, net of tax, and basic and diluted earnings increased by $0.08 per share.

Description of the Business and Basis of Presentation

9 Months Ended

Sep. 30, 2012

Description of the Business and Basis of Presentation [Abstract]

DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION

NOTE 1 — DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION

Customers Bancorp, Inc. (the “Bancorp”) is a Pennsylvania corporation formed on April 7, 2010 to facilitate the reorganization of Customers Bank (the “Bank”) into a bank holding company structure. The reorganization was completed on September 17, 2011. Any financial information for periods prior to September 17, 2011 contained herein reflects that of Customers Bank as the predecessor entity.

The unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial statements and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim reporting. Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations, although the Bancorp believes that the disclosures made are adequate to make the information not misleading. The Bancorp’s unaudited consolidated interim financial statements reflect all adjustments that are, in the opinion of management, necessary for fair statement of the results of interim periods presented. Certain amounts reported in the 2011 consolidated financial statements have been reclassified to conform to the 2012 presentation. These reclassifications did not significantly impact the Bancorp’s financial position or results of operations.

Operating results for the three-month and nine-month periods ended September 30, 2012 are not necessarily indicative of the results that may be expected for the year ended December 31, 2012.

The accounting policies of Customers Bancorp, Inc. and Subsidiaries, as applied in the consolidated interim financial statements presented herein, are substantially the same as those followed on an annual basis as disclosed on pages 80 through 90 of Customers’ Annual Report on Form 10-K for the fiscal year ended December 31, 2011. It is suggested that these financial statements be read in conjunction with the financial statements and the notes thereto included in the latest Form 10-K. In addition, the Bancorp has made accounting changes in the third quarter of 2012 that are detailed in the following section entitled “ACCOUNTING CHANGES.”

The Bancorp evaluated its September 30, 2012 consolidated financial statements for subsequent events through the date the financial statements were issued. The Bancorp is not aware of any additional subsequent events which would require recognition or disclosure in the financial statements.

ACCOUNTING CHANGES

The Fair Value Option

During the third quarter of 2012, we elected the fair value option for warehouse lending transactions documented under a Master Repurchase Agreement originated after July 1, 2012 in order to more accurately represent the short term nature of the transaction and its inherent credit risk. This adoption is in accordance with the parameters established by Accounting Standards Codification (“ASC”) 825-10-25, Financial Instruments-Overall-Recognition: The Fair Value Option. As a result of this election, new warehouse lending transactions were classified as “Loans held for sale” on the balance sheet. The interest income from the warehouse lending transactions was classified in “Interest Income – Loans receivable, taxable, including fees” on the income statement for the third quarter of 2012. As Loans Receivable, the warehouse lending transactions were accounted for on an amortized cost basis less an allowance for loan loss. An allowance for loan losses is not recorded for the warehouse lending transactions when measured at fair value since under ASC 825, the exit price (the repurchase price) for warehouse lending transactions considers the effect of expected credit losses.

Change in Accounting Estimates

Estimates of cash flows from purchased credit-impaired (“PCI”) loans were revised during the third quarter of 2012 due to conversion to a more sophisticated and precise loan valuation system. In accordance with the guidance in ASC 310-30, Receivables—Loans and Debt Securities Acquired with Deteriorated Credit Quality, interest income is based on an acquired loan’s expected cash flows. Acquired loans are generally assessed to be within the scope of ASC 310-30 if: (1) the asset shows evidence of having deteriorated in credit quality since it was originated, and (2) it is probable that the acquirer will be unable to collect all contractually required payments receivable. Complex models are needed to calculate loan-level and/or pool level expected cash flows in accordance with ASC 310-30. The loan data analysis provided by the new software is a more precise quantification of future cash flows than the analysis that was previously calculated manually. Conversion to the new system was completed in September 2012, and as a result, estimates of cash flows from PCI loans were revised. When converting to the new software system, we were required to calculate the estimated cash flows from the various acquisition dates of the PCI loans through the date the software was implemented as it was impracticable to perform these calculations on a monthly or quarterly basis. These changes in estimates are accounted for prospectively as a change in accounting estimate. In the third quarter of 2012, approximately $4.4 million was recognized in other non-interest income related to this change.

Also during the third quarter of 2012, we performed an initial re-estimation of the cash flows for the PCI loans. The re-estimation process updates the existing loan data for current loan assumptions. As a result of the initial re-estimation an increase of $4.5 million was recorded to interest income. As required by ASC 310-30, the recorded loan balance included accrued interest receivable. Due to the higher loan balance, we evaluated the adequacy of the allowance for loan losses and determined that an additional provision for loan losses of $7.5 million was appropriate. In the future, we will re-estimate the cash flows on the PCI loans on a quarterly basis, and adjustments, if any, are not expected to have a material impact on future earnings.

As a result of the changes in estimates, net income increased by $911,000, net of tax, and basic and diluted earnings increased by $0.08 per share.