The Company and Basis of Presentation - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2014 Location State Attendant Entity	Dec. 31, 2014 Location
Business And Basis Of Presentation [Line Items]
Number of students in degree programs	57,000
Number of states where online programs are offered	50
Number of locations	148
Number of campuses	147
Number of learning sites	1
Number of states	39
Number of variable interest entities	2
Subsequent Event [Member]
Business And Basis Of Presentation [Line Items]
Number of locations		144
Number of campuses closed		3
Number of learning sites closed		1