Other Events and Transactions (Narrative) (Details) - HBBHC $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fee income	$ 0.2
Expected net aggregate fees over term of TSA	$ 1.0

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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Balance Type:	na
Period Type:	duration