Acquisitions and Disposals - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Business Acquisition [Line Items]
Cash paid for acquisitions, primarily goodwill and intangible assets	$ 567,000	$ 61,159,000
Fair Value of the acquired intangible assets	400,000
Goodwill	$ 200,000us-gaap_GoodwillGross
Home health services
Business Acquisition [Line Items]
Number of entities acquired	1
Community-based services
Business Acquisition [Line Items]
Number of entities acquired	1

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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The number of businesses acquired by the entity during the period.

+ References

No definition available.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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