Recently Issued Accounting Standards (Policies)	6 Months Ended
Jun. 30, 2012
Recently Issued Accounting Standards [Abstract]
Reconsideration of Effective Control for Repurchase Agreements	In April 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-03, Reconsideration of Effective Control for Repurchase Agreements. This ASU removes from the assessment of effective control (1) the criterion requiring the transferor to have the ability to repurchase or redeem the financial assets on substantially the agreed terms, even in the event of default by the transferee, and (2) the collateral maintenance implementation guidance related to that criterion. This guidance was effective for the first interim or annual period beginning on or after December 15, 2011 and is to be applied prospectively to transactions or modifications of existing transactions that occur on or after the effective date. Adoption of this guidance has not had a material impact on results of operations or financial condition.
Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRS	In May 2011, the FASB issued ASU 2011-04, Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRS. The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. The guidance was effective for interim and annual periods beginning after December 15, 2011 is to be applied prospectively. Adoption of this guidance has not had a material impact on Customers Bancorp’s financial statements.
Presentation of Comprehensive Income	In June 2011, the FASB issued ASU 2011-05, Presentation of Comprehensive Income. Under the new guidance, the components of net income and the components of other comprehensive income can be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This guidance eliminates the option to present components of other comprehensive income as part of the changes in shareholders’ equity. This amendment is to be applied retrospectively and was effective for fiscal years and interim periods ending after December 15, 2011 for public companies. Adoption of this guidance has not had a significant impact on Customers Bancorp’s financial statements.
Testing Goodwill for Impairment	In September, 2011, the FASB issued ASU 2011-08, Testing Goodwill for Impairment. The purpose of this ASU is to simplify how entities test goodwill for impairment by adding a new first step to the preexisting goodwill impairment test under ASC Topic 350, Intangibles – Goodwill and other. This amendment gives the entity the option to first assess a variety of qualitative factors such as economic conditions, cash flows, and competition to determine whether it was more likely than not that the fair value of goodwill has fallen below its carrying value. If the entity determines that it is not likely that the fair value has fallen below its carrying value, then the entity will not have to complete the original two-step test under Topic 350. The amendments in this ASU were effective for impairment tests performed for fiscal years beginning after December 15, 2011. Adoption of this guidance has not had a material impact on results of operations or financial condition.
Derecognition of in Substance Real Estate - a Scope Clarification	In December, 2011, the FASB issued ASU 2011-10, Derecognition of in Substance Real Estate – a Scope Clarification. This ASU clarifies previous guidance for situations in which a reporting entity would relinquish control of the assets of a subsidiary in order to satisfy the nonrecourse debt of the subsidiary. The ASU concludes that if control of the assets has been transferred to the lender, but not legal ownership of the assets; then the reporting entity must continue to include the assets of the subsidiary in its consolidated financial statements. The amendments in this ASU are effective for public entities for annual and interim periods beginning on or after June 15, 2012. Early adoption is permitted. Adoption of this guidance has not had a material impact on results of operations or financial condition.
Disclosures about Offsetting Assets and Liabilities	In December, 2011, the FASB issued ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, in an effort to improve comparability between U.S. GAAP and IFRS financial statements with regard to the presentation of offsetting assets and liabilities on the statement of financial position arising from financial and derivative instruments, and repurchase agreements. The ASU establishes additional disclosures presenting the gross amounts of recognized assets and liabilities, offsetting amounts, and the net balance reflected in the statement of financial position. Descriptive information regarding the nature and rights of the offset must also be disclosed. This ASU is effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods. Customers Bancorp does not expect this ASU to have a significant impact on its consolidated financial statements.
Deferral of the Effective Date to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update 2011-05	<!-- xbrl,dnap,"Reclassification"/>In June 2012, the FASB decided to issue an exposure draft that would require new footnote disclosures of items reclassified from accumulated other comprehensive income to net income. The exposure draft is expected to be issued during the third quarter of 2012 for a sixty-day comment period. In July 2012, the FASB issued guidance amending the way companies test for indefinite-lived intangible asset impairment, allowing the option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test. This guidance is effective for interim and annual periods beginning after September 15, 2012, with early adoption permitted. Customers Bancorp will adopt the guidance in connection with its annual definite-lived intangible assets impairment test in the fourth quarter of fiscal 2012. Customers Bancorp does not expect the adoption will have a significant impact on its consolidated financial statements.

Recently Issued Accounting Standards (Policies)

6 Months Ended

Jun. 30, 2012

Recently Issued Accounting Standards [Abstract]

Reconsideration of Effective Control for Repurchase Agreements

In April 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-03, Reconsideration of Effective Control for Repurchase Agreements. This ASU removes from the assessment of effective control (1) the criterion requiring the transferor to have the ability to repurchase or redeem the financial assets on substantially the agreed terms, even in the event of default by the transferee, and (2) the collateral maintenance implementation guidance related to that criterion. This guidance was effective for the first interim or annual period beginning on or after December 15, 2011 and is to be applied prospectively to transactions or modifications of existing transactions that occur on or after the effective date. Adoption of this guidance has not had a material impact on results of operations or financial condition.

Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRS

In May 2011, the FASB issued ASU 2011-04, Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRS. The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. The guidance was effective for interim and annual periods beginning after December 15, 2011 is to be applied prospectively. Adoption of this guidance has not had a material impact on Customers Bancorp’s financial statements.

Presentation of Comprehensive Income

In June 2011, the FASB issued ASU 2011-05, Presentation of Comprehensive Income. Under the new guidance, the components of net income and the components of other comprehensive income can be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This guidance eliminates the option to present components of other comprehensive income as part of the changes in shareholders’ equity. This amendment is to be applied retrospectively and was effective for fiscal years and interim periods ending after December 15, 2011 for public companies. Adoption of this guidance has not had a significant impact on Customers Bancorp’s financial statements.

Testing Goodwill for Impairment

In September, 2011, the FASB issued ASU 2011-08, Testing Goodwill for Impairment. The purpose of this ASU is to simplify how entities test goodwill for impairment by adding a new first step to the preexisting goodwill impairment test under ASC Topic 350, Intangibles – Goodwill and other. This amendment gives the entity the option to first assess a variety of qualitative factors such as economic conditions, cash flows, and competition to determine whether it was more likely than not that the fair value of goodwill has fallen below its carrying value. If the entity determines that it is not likely that the fair value has fallen below its carrying value, then the entity will not have to complete the original two-step test under Topic 350. The amendments in this ASU were effective for impairment tests performed for fiscal years beginning after December 15, 2011. Adoption of this guidance has not had a material impact on results of operations or financial condition.

Derecognition of in Substance Real Estate - a Scope Clarification

In December, 2011, the FASB issued ASU 2011-10, Derecognition of in Substance Real Estate – a Scope Clarification. This ASU clarifies previous guidance for situations in which a reporting entity would relinquish control of the assets of a subsidiary in order to satisfy the nonrecourse debt of the subsidiary. The ASU concludes that if control of the assets has been transferred to the lender, but not legal ownership of the assets; then the reporting entity must continue to include the assets of the subsidiary in its consolidated financial statements. The amendments in this ASU are effective for public entities for annual and interim periods beginning on or after June 15, 2012. Early adoption is permitted. Adoption of this guidance has not had a material impact on results of operations or financial condition.

Disclosures about Offsetting Assets and Liabilities

In December, 2011, the FASB issued ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, in an effort to improve comparability between U.S. GAAP and IFRS financial statements with regard to the presentation of offsetting assets and liabilities on the statement of financial position arising from financial and derivative instruments, and repurchase agreements. The ASU establishes additional disclosures presenting the gross amounts of recognized assets and liabilities, offsetting amounts, and the net balance reflected in the statement of financial position. Descriptive information regarding the nature and rights of the offset must also be disclosed. This ASU is effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods. Customers Bancorp does not expect this ASU to have a significant impact on its consolidated financial statements.

Deferral of the Effective Date to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update 2011-05

<!-- xbrl,dnap,"Reclassification"/>In June 2012, the FASB decided to issue an exposure draft that would require new footnote disclosures of items reclassified from accumulated other comprehensive income to net income. The exposure draft is expected to be issued during the third quarter of 2012 for a sixty-day comment period.

In July 2012, the FASB issued guidance amending the way companies test for indefinite-lived intangible asset impairment, allowing the option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test. This guidance is effective for interim and annual periods beginning after September 15, 2012, with early adoption permitted. Customers Bancorp will adopt the guidance in connection with its annual definite-lived intangible assets impairment test in the fourth quarter of fiscal 2012. Customers Bancorp does not expect the adoption will have a significant impact on its consolidated financial statements.

- Definition

Disclosure of the accounting policy for determining which carrying amount is used for securities sold under repurchase agreements and the method used to determine that amount.

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