Stockholders’ Deficit

Treasury Stock

Treasury stock is accounted for under the cost method. Treasury stock includes shares repurchased under stock repurchase programs and shares withheld in lieu of minimum tax withholdings due upon vesting of RSUs.

On February 8, 2018, the Company’s Board of Directors (“Board”) authorized the repurchase of its common stock in the amount of approximately $585.8 million, in addition to the $414.2 million remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion under the share repurchase program. The share repurchase program has no expiration date. Purchases made under the program could be effected through open market transactions, block purchases, accelerated share repurchase agreements or other negotiated transactions. As of December 31, 2018 there was approximately $463.2 million remaining available for repurchases under the share repurchase program.

Effective February 7, 2019, the Company’s Board authorized the repurchase of its common stock in the amount of approximately $602.9 million, in addition to the $397.1 million remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion under the share repurchase program.

The summary of the Company’s common stock repurchases for 2018, 2017 and 2016 are as follows:



	2018				2017				2016
	Shares		Average Price		Shares		Average Price		Shares		Average Price
	(In thousands, except average price amounts)
Total repurchases under the repurchase plans	4,352		$	137.86	6,265		$	94.59	7,789		$	81.73
Total repurchases for tax withholdings	309		$	123.62	335		$	85.27	320		$	80.74
Total repurchases	4,661		$	136.91	6,600		$	94.12	8,109		$	81.70
Total costs	$	638,152			$	621,173			$	662,491

Since inception, the Company has repurchased 232.3 million shares of its common stock for an aggregate cost of $9.42 billion, which is recorded as a reduction of Additional paid-in capital.

Accumulated Other Comprehensive Loss

The following table summarizes the changes in the components of Accumulated other comprehensive loss for 2018 and 2017:



	Foreign Currency Translation Adjustments Loss			Unrealized Gain (Loss) On Investments			Total Accumulated Other Comprehensive Loss
	(In thousands)
Balance, December 31, 2016	$	(3,366	)	$	(87	)	$	(3,453	)
Changes	530			(18		)	512
Balance, December 31, 2017	(2,836		)	(105		)	(2,941		)
Changes	—			130			130
Balance, December 31, 2018	$	(2,836	)	$	25		$	(2,811	)