Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Total Receivables

Total receivables represent amounts billed and amounts earned that are to be billed in the future (i.e., accrued receivables). Included in accrued receivables are services and SaaS and PaaS revenues earned in the current period but billed in the following period and amounts due under multi-year software license arrangements with extended payment terms for which the Company has an unconditional right to invoice and receive payment subsequent to invoicing.

	December 31,
(in thousands)	2018			2017
Billed receivables	$	239,275		$	240,137
Allowance for doubtful accounts		(3,912	)		(4,799	)
Billed receivables, net	$	235,363		$	235,338
Accrued receivables		336,858			27,507
Significant financing component		(35,029	)		—
Total accrued receivables, net		301,829			27,507
Less current accrued receivables		123,053			27,507
Less current significant financing component		(10,234	)		—
Total long-term accrued receivables, net	$	189,010		$	—
Total receivables, net	$	537,192		$	262,845

Activity in Allowance for Doubtful Accounts Receivable

The following reflects activity in the Company’s allowance for doubtful accounts receivable for the periods indicated (in thousands):

	Years Ended December 31,
	2018			2017			2016
Balance, beginning of period	$	(4,799	)	$	(3,873	)	$	(5,045	)
Provision increase		(1,505	)		(2,086	)		(1,595	)
Amounts written off, net of recoveries		2,269			1,305			2,551
Foreign currency translation adjustments and other		123			(145	)		216
Balance, end of period	$	(3,912	)	$	(4,799	)	$	(3,873	)

Changes in Deferred Revenue

Changes in deferred revenue were as follows (in thousands):

	Deferred Revenue
Balance, January 1, 2018	$	145,344
Deferral of revenue		215,188
Recognition of deferred revenue		(200,061	)
Foreign currency translation		(4,336	)
Balance, December 31, 2018	$	156,135

Financial Statement Effect of Applying ASC 606

The financial statement line items affected by adoption of ASC 606 are as follows (in thousands):

	December 31, 2018
	As Reported		Without Application of ASC 606		Effect of Change Higher / (Lower)
Assets
Receivables, net of allowances	$	348,182	$	272,409	$	75,773
Recoverable income taxes		6,686		13,539		(6,853	)
Prepaid expenses		23,277		24,018		(741	)
Other current assets		39,830		38,717		1,113
Accrued receivables, net		189,010		—		189,010
Deferred income taxes, net		27,048		61,554		(34,506	)
Other noncurrent assets		52,145		41,590		10,555
Liabilities
Deferred revenue		104,843		134,565		(29,722	)
Income taxes payable		5,239		5,472		(233	)
Other current liabilities		88,054		88,288		(234	)
Deferred income taxes, net		31,715		10,178		21,537
Stockholders’ equity
Total stockholders’ equity		1,048,231		805,228		243,003

	Year Ended December 31, 2018
	As Reported			Without Application of ASC 606			Effect of Change Higher / (Lower)
Revenues
Software as a service and platform as a service	$	433,025		$	432,095		$	930
License		280,556			281,355			(799	)
Maintenance		219,145			221,189			(2,044	)
Services		77,054			77,595			(541	)
Operating expenses
Selling and marketing		117,881			110,417			7,464
Other income (expense)
Interest income		11,142			831			10,311
Other, net		(3,724	)		(3,274	)		(450	)
Income tax provision
Income tax expense (benefit)		22,878			22,981			(103	)