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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Revenue Disaggregated by Type of Revenue and Geographic Region

The nature, amount, timing and uncertainty of our revenue and how revenue and cash flows are affected by economic factors is most appropriately depicted by type of revenue as presented below (in thousands) and by geographic region as presented in Note 3.

	For the Year Ended December 31,
	2019		2018
Cloud and related solutions	$	896,164	$	766,377
Software and services		52,364		58,101
Maintenance		48,282		50,581
Total revenues	$	996,810	$	875,059

Rollforward of Unbilled Accounts Receivable

The following table rolls forward our unbilled accounts receivable from January 1, 2018 to December 31, 2019 (in thousands):

	Unbilled Receivables
Beginning Balance, January 1, 2018	$	33,104
Recognized during the period		237,134
Reclassified to receivables		(231,689	)
Other		(1,322	)
Ending Balance, December 31, 2018		37,227
Recognized during the period		252,445
Reclassified to receivables		(255,983	)
Other		(239	)
Ending Balance, December 31, 2019	$	33,450

Rollforward of Deferred Revenue

The following table rolls forward our deferred revenue from January 1, 2018 to December 31, 2019 (in thousands):

	Deferred Revenue
Beginning Balance, January 1, 2018	$	(47,611	)
Revenue recognized that was included in deferred revenue at the beginning of the period		38,832
Consideration received in advance of services performed net of revenue recognized in the current period		(50,861	)
Other		1,877
Ending Balance, December 31, 2018		(57,763	)
Revenue recognized that was included in deferred revenue at the beginning of the period		39,352
Consideration received in advance of services performed net of revenue recognized in the current period		(44,051	)
Other		(1,184	)
Ending Balance, December 31, 2019	$	(63,646	)

Fair Value Measurements

The following table represents the fair value hierarchy based upon three levels of inputs, of which Levels 1 and 2 are considered observable and Level 3 is unobservable, for our financial assets measured at fair value (in thousands):

	December 31, 2019						December 31, 2018
	Level 1		Level 2		Total		Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	4,847	$	—	$	4,847	$	4,392	$	—	$	4,392
Commercial paper		—		26,964		26,964		—		9,078		9,078
Short-term investments:
Corporate debt securities		—		22,159		22,159		—		16,357		16,357
U.S. government agency bonds		—		—		—		—		3,724		3,724
Asset-backed securities		—		3,950		3,950		—		3,522		3,522
Total	$	4,847	$	53,073	$	57,920	$	4,392	$	32,681	$	37,073

Carrying Value and Estimated Fair Value of Debt

We have chosen not to record our debt at fair value, with changes recognized in earnings each reporting period. The following table indicates the carrying value and estimated fair value of our debt as of the indicated periods (in thousands):

	December 31, 2019				December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value
2018 Credit Agreement (carrying value including current maturities)	$	136,875	$	136,875	$	144,375	$	144,375
2016 Convertible debt (par value)		230,000		262,775		230,000		228,275

Allowance for Doubtful Accounts Receivable

The activity in our allowance for doubtful accounts receivable is as follows (in thousands):

	2019			2018			2017
Balance, beginning of year	$	3,115		$	4,149		$	3,080
Additions to expense		778			462			2,434
Write-offs		(158	)		(1,659	)		(1,392	)
Recoveries		—			—			5
Other		—			163			22
Balance, end of year	$	3,735		$	3,115		$	4,149

Reconciliation of the Basic and Diluted EPS denominators

The reconciliation of the basic and diluted EPS denominators related to the common shares is included in the following table (in thousands):

	2019		2018		2017
Basic weighted-average common shares		32,051		32,488		32,415
Dilutive effect of restricted stock		282		218		444
Dilutive effect of Stock Warrants		132		149		6
Diluted weighted-average common shares		32,465		32,855		32,865