Goodwill and Other Intangible Assets - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	147 months
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	49 months
Advisor relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	168 months
Sponsor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	216 months
Curriculum [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	48 months
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	68 months