Segment Information - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Segment Reporting Information [Line Items]
Other intangibles impairment charge	$ 650,000	$ 650,000
Facility-based services [Member]
Segment Reporting Information [Line Items]
Other intangibles impairment charge	400,000	400,000
Income tax expense reclassification	162,400	162,400
Reduction of assets	$ 400,000	$ 400,000