Acquisitions and Disposals - Schedule of Aggregate Consideration Paid and Recognized Identified Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Consideration
Cash paid for acquisitions, primarily goodwill and intangible assets	$ 1,621
Fair value of total consideration transferred	1,621
Recognized amounts of identifiable assets acquired and liabilities assumed
Other assets and (liabilities), net	(76)
Total identifiable assets	254
Noncontrolling interest	98
Goodwill, including noncontrolling interest of $38	1,465
Certificate of Need/Licenses [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business acquisition, purchase price allocation, Intangible Assets	167
Trade Names [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business acquisition, purchase price allocation, Intangible Assets	153
Other identifiable intangible assets [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business acquisition, purchase price allocation, Intangible Assets	$ 10