Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2016

Cash, cash equivalents and investments consisted of the following (in thousands):



	March 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and Cash Equivalents		Investments
Cash	$	263,502	$	—	$	—	$	263,502	$	263,502	$	—
Time deposits	717,042		—		—		717,042		716,278		764
Totals	$	980,544	$	—	$	—	$	980,544	$	979,780	$	764

	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and Cash Equivalents		Investments
Cash	$	274,945	$	—	$	—	$	274,945	$	274,945	$	—
Time deposits	713,840		—		—		713,840		713,840		—
Totals	$	988,785	$	—	$	—	$	988,785	$	988,785	$	—

Available-for-Sale Securities and Other Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes, by major security type, our available-for-sale securities as of March 31, 2016 and December 31, 2015 that were measured at fair value on a recurring basis and were categorized using the fair value hierarchy (in thousands):



	March 31, 2016				December 31, 2015
	Significant Other Observable Inputs (Level 2)		Total Estimated Fair Value		Significant Other Observable Inputs (Level 2)		Total Estimated Fair Value
Time deposits	$	717,042	$	717,042	$	713,840	$	713,840