Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The accounting guidance for fair value measurements provides a framework for measuring fair value on either a recurring or nonrecurring basis, whereby the inputs used in our valuation techniques are assigned a hierarchical level. The following are the three levels of inputs to measure fair value:

• Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2: Inputs that reflect quoted prices for identical assets or liabilities in less active markets; quoted prices for similar assets or liabilities in active markets; benchmark yields, reported trades, broker/dealer quotes, inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3: Unobservable inputs that reflect our own assumptions incorporated in valuation techniques used to measure fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available.

We consider an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and consider an inactive market to be one in which there are infrequent or few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate, our own or the counterparty’s non-performance risk is considered in measuring the fair values of assets.

The following table presents our assets and liabilities measured at fair value on a recurring basis using the above input categories (in thousands):

	As of September 30, 2017								As of December 31, 2016
Description	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	844	$	—	$	—	$	844	$	449	$	—	$	—	$	449
Total cash equivalents	844		—		—		844		449		—		—		449
Short-term investments:
Certificates of deposit	—		1,440		—		1,440		—		9,569		—		9,569
Commercial paper	—		7,468		—		7,468		—		29,920		—		29,920
Corporate notes and bonds	—		443,499		—		443,499		—		420,684		—		420,684
U.S. Government agencies	—		265,553		—		265,553		—		251,885		—		251,885
Total short-term investments	—		717,960		—		717,960		—		712,058		—		712,058
Total assets measured at fair value	$	844	$	717,960	$	—	$	718,804	$	449	$	712,058	$	—	$	712,507
Liabilities
Contingent earn-out	$	—	$	—	$	—	$	—	$	—	$	—	$	41,332	$	41,332
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	—	$	—	$	41,332	$	41,332

The estimated fair value of the contingent earn-out incurred in connection with our acquisition of iSIGHT is considered to be a Level 3 measurement due to the use of significant unobservable inputs. The value was determined using a discounted risk-adjusted expected (probability-weighted) cash flow methodology, by applying a real options approach model. The real options approach incorporated management's estimates of expected quarterly growth rates in bookings for certain products (63% on average), which could not be corroborated by observable market data, with the volatility of revenue for comparable companies (16.5% on average) and the correlation between comparable companies' quarterly revenue growth and that of the S&P 500 Index (44.7% on average), which are observable in the market, to determine the probability of achieving estimated bookings within the earn-out period of performance (2.5 years). The resulting expected earn-out payment was discounted back to present value using our cost of debt (ranging from 6.3% to 7.1%).

The following is a reconciliation of the Level 3 contingent earn-out liability (in thousands):

	Amount
Balance as of December 31, 2016	$	41,332
Changes in fair value (1)	(54		)
Cash payments	(41,278		)
Balance as of September 30, 2017	$	—

(1) Changes in fair value are recorded in general and administrative expenses in our condensed consolidated statements of operations.

Additionally, we have a restructuring liability related to certain real estate facilities which was calculated based on the present value of future lease payments, less estimated sublease income, discounted at a rate commensurate with our current cost of financing. This non-recurring fair value measurement is considered to be a Level 3 measurement due to the use of significant unobservable inputs. To the extent that actual sublease income or the timing of subleasing these facilities is different than initial estimates, we will adjust the restructuring liability in the period during which such information becomes known. See Note 6 Restructuring Charges for a reconciliation of this liability.

We measure certain assets, including goodwill, intangible assets and our equity-method investment in a private company at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. No such events or changes occurred during the nine months ended September 30, 2017.

The estimated fair value of the Convertible Senior Notes (as defined in Note 8) as of September 30, 2017 was determined to be $878.6 million, based on quoted market prices. We consider the fair value of the Convertible Senior Notes to be a Level 2 measurement as they are not actively traded.