Commitments and Contingencies - Additional Information (Detail) - Ensign [Member] - USD ($) $ in Millions		1 Months Ended
Oct. 01, 2013	Oct. 31, 2013
Loss Contingencies [Line Items]
Single lump-sum remittance to the government		$ 48.0
Corporate integrity agreement period	5 years

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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