Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Significant Accounting Policies [Abstract]

Schedule of graduation fund liability

The table below presents activity in the Graduation Fund for the six months ended June 30, 2016 and 2017 (in thousands):

	June 30,		June 30,
	2016		2017
Balance at beginning of period	$	20,937	$	29,499
Revenue deferred		10,128		11,982
Benefit redeemed		(5,806)		(7,719)
Balance at end of period	$	25,259	$	33,762

Schedule of tuition receivable and allowance for doubtful accounts

	December 31, 2016		June 30, 2017
Tuition receivable	$	30,733	$	32,102
Allowance for doubtful accounts		(10,201)		(11,760)
Tuition receivable, net	$	20,532	$	20,342

Schedule of allowance for doubtful accounts

	For the three months ended				For the six months ended
	June 30,				June 30,
	2016		2017		2016		2017
Allowance for doubtful accounts, beginning of period	$	10,226	$	10,820	$	10,024	$	10,201
Additions charged to expense		4,136		5,090		7,204		9,472
Write-offs, net of recoveries		(4,381)		(4,150)		(7,247)		(7,913)
Allowance for doubtful accounts, end of period	$	9,981	$	11,760	$	9,981	$	11,760

Schedule of reconciliation of shares used to calculate basic and diluted earnings per share

	For the three months ended		For the six months ended
	June 30,		June 30,
	2016	2017	2016	2017
Weighted average shares outstanding used to compute basic earnings per share	10,610	10,680	10,603	10,655
Incremental shares issuable upon the assumed exercise of stock options	—	41	—	38
Unvested restricted stock and restricted stock units	189	469	187	462
Shares used to compute diluted earnings per share	10,799	11,190	10,790	11,155