Goodwill and Intangibles - Schedule of Carrying Value of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 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	(1,422)	(542)
Amortizable intangible assets, Net Carrying Value	2,848	3,728
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	(703)	(203)
Amortizable intangible assets, Net Carrying Value	$ 1,797	$ 2,297
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	(336)	(112)
Amortizable intangible assets, Net Carrying Value	$ 784	$ 1,008
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	(210)	(84)
Amortizable intangible assets, Net Carrying Value	$ 230	$ 356
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	(173)	(143)
Amortizable intangible assets, Net Carrying Value	$ 37	$ 67
Amortizable intangible assets, Weighted Average Amortization Period	84 months	84 months