Student Receivables - Changes in Current and Non-Current Receivables Allowance (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Balance, Beginning of Period		$ 19,097	$ 27,504	$ 37,938
Charges to Expense	[1]	22,212	14,864	25,939
Amounts Written-off		(21,080)	(23,271)	(36,373)
Balance, End of Period		$ 20,229	$ 19,097	$ 27,504

[1] Charges to expense include an offset for recoveries of amounts previously written off of $6.7 million, $8.5 million and $7.2 million for the years ended December 31, 2015, 2014 and 2013, respectively.