Commitments and Contingencies (Details) - Unfavorable Regulatory Action [Member]	12 Months Ended
Dec. 31, 2016 Review Violation
Loss Contingencies [Line Items]
Number of CTB deposit add-on products under review \| Review	2
Number of likely violations \| Violation	2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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