Goodwill and Other Intangibles - Schedule of Carrying Value of Acquired Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	$ 4,270	$ 2,600
Amortizable intangible assets, Accumulated Amortization	(1,201)	(350)
Amortizable intangible assets, Net Carrying Value	3,069	2,250
Customer Relationships [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Value	2,500	1,200
Amortizable intangible assets, Accumulated Amortization	(578)	(100)
Amortizable intangible assets, Net Carrying Value	1,922	1,100
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	750
Amortizable intangible assets, Accumulated Amortization	(280)	(63)
Amortizable intangible assets, Net Carrying Value	840	687
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	(178)	(52)
Amortizable intangible assets, Net Carrying Value	262	388
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	(165)	(135)
Amortizable intangible assets, Net Carrying Value	$ 45	$ 75
Amortizable intangible assets, Weighted Average Amortization Period	84 months	84 months