Goodwill and Intangibles - Schedule of Carrying Value of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 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	(1,641)	(761)
Amortizable intangible assets, Net Carrying Value	2,629	3,509
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	(828)	(328)
Amortizable intangible assets, Net Carrying Value	$ 1,672	$ 2,172
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	(392)	(168)
Amortizable intangible assets, Net Carrying Value	$ 728	$ 952
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	(241)	(115)
Amortizable intangible assets, Net Carrying Value	$ 199	$ 325
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	(180)	(150)
Amortizable intangible assets, Net Carrying Value	$ 30	$ 60
Amortizable intangible assets, Weighted Average Amortization Period	84 months	84 months