Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized below:

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(In thousands)	Fair Value Measurements at Reporting Date Using
Description	December 31, 2019			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets
Cash and cash equivalents available for sale:
Money Market Funds	$	87,397		$	87,397	$	—		$	—
Corporate notes and bonds	9,962			—		9,962			—
Short-term investments available for sale:
Corporate bonds	237,983			—		237,983			—
Derivatives	8,209			—		8,209			—
Total Assets	$	343,551		$	87,397	$	256,154		$	—
Liabilities
Derivatives	$	(2,872	)	—		(2,872		)	—
Total Liabilities	$	(2,872	)	$	—	$	(2,872	)	$	—

(In thousands)	Fair Value Measurements at Reporting Date Using
Description	December 31, 2018			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets
Cash and cash equivalents available for sale:
Money Market Funds	$	62,094		$	62,094	$	—		$	—
Corporate notes and bonds	9,979			—		9,979			—
Short-term investments available for sale:
Corporate bonds	234,473			—		234,473			—
U.S. treasuries and agencies	36,923			—		36,923			—
Derivatives	9,369			—		9,369			—
Total Assets	$	352,838		$	62,094	$	290,744		$	—
Liabilities
Derivatives	$	(1,483	)	$	—	$	(1,483	)	$	—
Total Liabilities	$	(1,483	)	$	—	$	(1,483	)	$	—