Background and Basis of Presentation (Details) - City National [Member]	Mar. 31, 2016 store
Entity Location [Line Items]
Number of Stores	85
WEST VIRGINIA
Entity Location [Line Items]
Number of Stores	57
VIRGINIA
Entity Location [Line Items]
Number of Stores	14
KENTUCKY
Entity Location [Line Items]
Number of Stores	11
OHIO
Entity Location [Line Items]
Number of Stores	3

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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Namespace Prefix:	dei_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration