Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Reserve for Authorized But Unissued Shares of Common Stock

As of December 31, 2018, the Company had reserved the following authorized but unissued shares of common stock for future issuances:

Common stock options and restricted stock units	3,885,220
Common stock employee purchase plans	3,120,425
Total	7,005,645

Components of Accumulated Other Comprehensive Loss, Net of Tax

The components of the Company's accumulated other comprehensive loss, net of tax, consisted of the following as of December 31, 2018, 2017 and 2016 (in thousands):

	December 31, 2015			Net Change			December 31, 2016			Net Change			December 31, 2017			Net Change			Cumulative Effect Adjustment			December 31, 2018
Foreign currency translation adjustment ("CTA") gain (loss)	$	(523,709	)	$	(507,420	)	$	(1,031,129	)	$	454,269		$	(576,860	)	$	(421,743	)	$	—		$	(998,603	)
Unrealized gain (loss) on cash flow hedges(1)	11,153			19,551			30,704			(54,895		)	(24,191		)	43,671			—			19,480
Net investment hedge CTA gain (loss)(1)	4,484			45,505			49,989			(235,292		)	(185,303		)	219,628			—			34,325
Unrealized gain (loss) on available for sale securities(2)	(139		)	2,249			2,110			14			2,124			—			(2,124		)	—
Net actuarial gain (loss) on defined benefit plans(3)	(848		)	32			(816		)	(143		)	(959		)	55			—			(904		)
	$	(509,059	)	$	(440,083	)	$	(949,142	)	$	163,953		$	(785,189	)	$	(158,389	)	$	(2,124	)	$	(945,702	)

⁽¹⁾  Refer to Note 8 for a discussion of the amounts reclassified from accumulated other comprehensive loss to net income.

⁽²⁾ Upon adoption of ASU 2016-01 during the three months ended March 31, 2018, the Company recorded a net cumulative effect adjustment of $2.1 million from accumulated other comprehensive loss to retained earnings. The realized gains and losses reclassified from accumulated other comprehensive loss to net income as a result of sale of available for sale securities were not significant for the years ended December 31, 2017 and 2016.

⁽³⁾  The Company has a defined benefit pension plan covering all employees in one country where such plans are mandated by law. The Company does not have any defined benefit plans in any other countries. The unamortized gain (loss) on defined benefit plans includes gains or losses resulting from a change in the value of either the projected benefit obligation or the plan assets resulting from a change in an actuarial assumption, net of amortization.

Quarterly Dividend and Special Distributions

For the years ended December 31, 2018 and 2017, the quarterly dividends were classified as follows:

Record Date	Payment Date	Total Distribution		Nonqualified Ordinary Dividend		Qualified Ordinary Dividend		Return of Capital
		(per share)
Fiscal 2018
2/26/2018	3/21/2018	$	2.280000	$	2.280000	$	—	$	—
5/23/2018	6/20/2018	2.280000		2.280000		—		—
8/22/2018	9/19/2018	2.280000		2.280000		—		—
11/14/2018	12/12/2018	2.280000		2.280000		—		—
Total		$	9.120000	$	9.120000	$	—	$	—
Fiscal 2017
2/27/2017	3/22/2017	$	2.000000	$	2.000000	$	—	$	—
5/24/2017	6/21/2017	2.000000		2.000000		—		—
8/23/2017	9/20/2017	2.000000		2.000000		—		—
11/15/2017	12/13/2017	2.000000		2.000000		—		—
Total		$	8.000000	$	8.000000	$	—	$	—