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Component: (Network and Table)
Network
2431405 - Disclosure - Disclosures about Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Detail)
(http://www.customersbank.com/role/DisclosuresAboutFairValueOfFinancialInstrumentsStatementOfChangesInLevel3AssetsMeasuredAtFairValueOnRecurringBasisDetail)
TableFair Value Measurements, Recurring and Nonrecurring [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001488813 (http://www.sec.gov/CIK)
Fair Value, Hierarchy [Axis]Significant Unobservable Inputs (Level 3)
Major Types of Debt and Equity Securities [Axis]Residential Mortgage Loan Commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
 
 
Balance at January 1,
45,000  
43,000  
Issuances
400,000  
273,000  
Settlements
(400,000) 
(271,000) 
Balance at December 31,
45,000  
 
45,000