Acquisitions and Disposals - Schedule of Aggregate Consideration Paid and Recognized Identified Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Business Acquisition [Line Items]
Noncontrolling interest	$ 98
Hospice-based services [Member]
Business Acquisition [Line Items]
Noncontrolling interest	$ 38