Redeemable Noncontrolling Interests (Narrative) (Details)	Mar. 31, 2017
naviHealth
Redeemable Noncontrolling Interest [Line Items]
Ownership interest (as a percent)	82.00%

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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration