Acquisitions and Disposals - Schedule of Aggregate Consideration Paid and Recognized Identified Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Business Acquisition [Line Items]
Noncontrolling interest	$ 98
Home health entity
Business Acquisition [Line Items]
Noncontrolling interest	$ 38