Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

Financial assets measured at fair value on a recurring basis as of December 31, 2016 are classified using the fair value hierarchy in the table below:

	Total		Level 1		Level 2
	(In thousands)
Assets
Cash equivalents:
Money market funds	$	113,955	$	113,955	$	—
Time deposits	299,585		—		299,585
Investments:
Time deposits	24,576		—		24,576
Corporate debt securities	64,227		—		64,227
Total assets	$	502,343	$	113,955	$	388,388
Liabilities
Derivatives:
Foreign currency forward contracts	$	4,402	$	—	$	4,402

Financial assets measured at fair value on a recurring basis as of December 31, 2015 are classified using the fair value hierarchy in the table below:

	Total		Level 1		Level 2
	(In thousands)
Assets
Cash equivalents:
Money market funds	$	218,340	$	218,340	$	—
Time deposits	29,126		—		29,126
Derivatives:
Foreign currency forward contracts	8,045		—		8,045
Investments:
Corporate debt securities	98,403		—		98,403
Total assets	$	353,914	$	218,340	$	135,574