Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Operating Expenses as Previously Reported and as Reclassified

The following table presents the Company's operating expenses as previously reported and as reclassified on its unaudited condensed consolidated statements of income for the three months ended (in thousands):



	New Classification
	March 31, 2018				June 30, 2018				September 30, 2018				December 31, 2018
Prior Classification	I&SC		G&A		I&SC		G&A		I&SC		G&A		I&SC		G&A
Instructional and educational support	$	63,776	$	—	$	64,690	$	—	$	93,290	$	—	$	118,320	$	—
Admissions advisory	4,676		—		4,609		—		9,789		—		12,392		—
Marketing	—		20,124		—		21,113		—		46,165		—		49,577
General and administration	—		11,218		—		11,063		—		15,811		—		18,964
Total reclassified costs and expenses⁽¹⁾	$	68,452	$	31,342	$	69,299	$	32,176	$	103,079	$	61,976	$	130,712	$	68,541

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⁽¹⁾This amount excludes the amortization of intangible assets and merger and integration costs expense line items on the condensed consolidated statements of income as those expense line items were not impacted by the operating expense reclassification.

Schedule of cash, cash equivalents, and restricted cash

The following table illustrates the reconciliation of cash, cash equivalents, and restricted cash shown in the unaudited condensed consolidated statements of cash flows as of March 31, 2018 and 2019 (in thousands):



	As of March 31,
	2018		2019
Cash and cash equivalents	$	165,867	$	352,387
Restricted cash included in other current assets	8		5
Restricted cash included in other long-term assets	500		500
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$	166,375	$	352,892

Schedule of tuition receivable and allowance for doubtful accounts

The Company’s tuition receivable and allowance for doubtful accounts were as follows as of December 31, 2018 and March 31, 2019 (in thousands):



	December 31, 2018			March 31, 2019
Tuition receivable	$	84,151		$	80,229
Allowance for doubtful accounts	(28,457		)	(29,387		)
Tuition receivable, net	$	55,694		$	50,842

Schedule of allowance for doubtful accounts

The following table illustrates changes in the Company’s allowance for doubtful accounts for the three months ended March 31, 2018 and 2019 (in thousands):



	For the three months ended March 31,
	2018			2019
Allowance for doubtful accounts, beginning of period	$	12,687		$	28,457
Additions charged to expense	6,391			12,320
Write-offs, net of recoveries	(5,303		)	(11,390		)
Allowance for doubtful accounts, end of period	$	13,775		$	29,387

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

Set forth below is a reconciliation of shares used to calculate basic and diluted earnings per share for the three months ended March 31, 2018 and 2019 (in thousands):



	For the three months ended March 31,
	2018	2019
Weighted average shares outstanding used to compute basic earnings per share	10,745	21,499
Incremental shares issuable upon the assumed exercise of stock options	45	92
Unvested restricted stock and restricted stock units	521	459
Shares used to compute diluted earnings per share	11,311	22,050