Fair value measurements (Tables)

6 Months Ended

Jun. 30, 2018

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:

	Fair Value Measurements at Reporting Date Using
(In thousands)	(Unaudited)
Description	June 30, 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	$	46,170		$	46,170	$	—		$	—
Short-term investments available for sale:
Corporate bonds	170,150			—		170,150			—
U.S. treasuries and agencies	39,354			—		39,354			—
Time deposits	1,300			1,300		—			—
Derivatives	7,799			—		7,799			—
Total Assets	$	264,773		$	47,470	$	217,303		$	—
Liabilities
Derivatives	$	(3,232	)	$	—	$	(3,232	)	$	—
Total Liabilities	$	(3,232	)	$	—	$	(3,232	)	$	—

(In thousands)	Fair Value Measurements at Reporting Date Using
Description	December 31, 2017			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	$	61,423		$	61,423	$	—		$	—
U.S. treasuries and agencies	39,461			—		39,461			—
Short-term investments available for sale:
Corporate bonds	120,128			—		120,128			—
Time deposits	1,760			1,760		—			—
Derivatives	7,232			—		7,232			—
Total Assets	$	230,004		$	63,183	$	166,821		$	—
Liabilities
Derivatives	$	(12,743	)	$	—	$	(12,743	)	$	—
Total Liabilities	$	(12,743	)	$	—	$	(12,743	)	$	—