Description of the Business	9 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	DESCRIPTION OF THE BUSINESS Customers Bancorp, Inc. (the “Bancorp” or “Customers Bancorp”) is a bank holding company engaged in banking activities through its wholly owned subsidiary, Customers Bank (the “Bank”), collectively referred to as “Customers” herein. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Customers Bancorp, Inc. and its wholly owned subsidiaries, Customers Bank, and non-bank subsidiaries, serve residents and businesses in Southeastern Pennsylvania (Bucks, Berks, Chester, Philadelphia and Delaware Counties); Rye, New York (Westchester County); Hamilton, New Jersey (Mercer County); Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire (Rockingham County); Manhattan, New York; and nationally for certain loan and deposit products. The Bank has 14 full-service branches and provides commercial banking products, primarily loans and deposits. In addition, Customers Bank also administratively supports loan and other financial products to customers through its limited-purpose offices in Boston, Massachusetts, Providence, Rhode Island, Portsmouth, New Hampshire, Manhattan and Melville, New York, and Philadelphia, Pennsylvania. The Bank also provides liquidity to residential mortgage originators nationwide through commercial loans to mortgage companies. Through BankMobile, a division of Customers Bank, Customers offers state of the art high tech digital banking services to consumers, students, and the "under banked" nationwide. The combination of the BankMobile technology software platform with the Vibe Student Checking and Refund Management Disbursement Services business (the "Disbursement business") acquired from Higher One Holdings, Inc. and Higher One, Inc. (together, "Higher One") in June 2016 propelled BankMobile to one of the largest mobile banking services in the United States by number of customers. Customers has announced its intent to spin-off BankMobile to Customers’ shareholders through a tax-free spin-off/merger transaction. Accordingly, the assets and liabilities of BankMobile will not be reported separately as held for sale, and its operating results and associated cash flows will not be reported as discontinued operations, until execution of the spin-off/merger transaction and will be considered held and used for all periods presented. Previously reported held-for-sale balances in the consolidated balance sheet as of December 31, 2016, and corresponding operating results and cash flows for the periods presented, have been reclassified to conform with the current period consolidated financial statement presentation. See NOTE 3 TAX-FREE SPIN-OFF AND MERGER. Customers is subject to regulation of the Pennsylvania Department of Banking and Securities and the Federal Reserve Bank and is periodically examined by those regulatory authorities. Customers Bancorp has made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd.

DESCRIPTION OF THE BUSINESS

Customers Bancorp, Inc. (the “Bancorp” or “Customers Bancorp”) is a bank holding company engaged in banking activities through its wholly owned subsidiary, Customers Bank (the “Bank”), collectively referred to as “Customers” herein. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”).

Customers Bancorp, Inc. and its wholly owned subsidiaries, Customers Bank, and non-bank subsidiaries, serve residents and businesses in Southeastern Pennsylvania (Bucks, Berks, Chester, Philadelphia and Delaware Counties); Rye, New York (Westchester County); Hamilton, New Jersey (Mercer County); Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire (Rockingham County); Manhattan, New York; and nationally for certain loan and deposit products. The Bank has 14 full-service branches and provides commercial banking products, primarily loans and deposits. In addition, Customers Bank also administratively supports loan and other financial products to customers through its limited-purpose offices in Boston, Massachusetts, Providence, Rhode Island, Portsmouth, New Hampshire, Manhattan and Melville, New York, and Philadelphia, Pennsylvania. The Bank also provides liquidity to residential mortgage originators nationwide through commercial loans to mortgage companies.

Through BankMobile, a division of Customers Bank, Customers offers state of the art high tech digital banking services to consumers, students, and the "under banked" nationwide. The combination of the BankMobile technology software platform with the Vibe Student Checking and Refund Management Disbursement Services business (the "Disbursement business") acquired from Higher One Holdings, Inc. and Higher One, Inc. (together, "Higher One") in June 2016 propelled BankMobile to one of the largest mobile banking services in the United States by number of customers. Customers has announced its intent to spin-off BankMobile to Customers’ shareholders through a tax-free spin-off/merger transaction. Accordingly, the assets and liabilities of BankMobile will not be reported separately as held for sale, and its operating results and associated cash flows will not be reported as discontinued operations, until execution of the spin-off/merger transaction and will be considered held and used for all periods presented. Previously reported held-for-sale balances in the consolidated balance sheet as of December 31, 2016, and corresponding operating results and cash flows for the periods presented, have been reclassified to conform with the current period consolidated financial statement presentation. See NOTE 3 TAX-FREE SPIN-OFF AND MERGER.

Customers is subject to regulation of the Pennsylvania Department of Banking and Securities and the Federal Reserve Bank and is periodically examined by those regulatory authorities. Customers Bancorp has made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd.