Goodwill and Intangibles - Schedule of Carrying Value of Acquired Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	$ 4,270	$ 4,270
Amortizable intangible assets, Accumulated Amortization	(1,861)	(982)
Amortizable intangible assets, Net Carrying Value	2,409	3,288
Customer Relationships [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	2,500	2,500
Amortizable intangible assets, Accumulated Amortization	(953)	(453)
Amortizable intangible assets, Net Carrying Value	$ 1,547	$ 2,047
Amortizable intangible assets, Weighted Average Amortization Period	60 months	60 months
Non-compete Agreements [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	$ 1,120	$ 1,120
Amortizable intangible assets, Accumulated Amortization	(448)	(224)
Amortizable intangible assets, Net Carrying Value	$ 672	$ 896
Amortizable intangible assets, Weighted Average Amortization Period	60 months	60 months
Training Materials [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	$ 440	$ 440
Amortizable intangible assets, Accumulated Amortization	(272)	(147)
Amortizable intangible assets, Net Carrying Value	$ 168	$ 293
Amortizable intangible assets, Weighted Average Amortization Period	42 months	42 months
Accreditation [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	$ 210	$ 210
Amortizable intangible assets, Accumulated Amortization	(188)	(158)
Amortizable intangible assets, Net Carrying Value	$ 22	$ 52
Amortizable intangible assets, Weighted Average Amortization Period	84 months	84 months