Performance-Based Stock Awards Issued and Outstanding (Details) - Amended and Restated 2010 Incentive Plan - Performance Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Performance Stock Units
Unvested, Beginning Balance | shares	137	[1]
Granted | shares	47	[1]
Performance adjustment | shares	29	[1],[2]
Vested | shares	(58)	[1]
Forfeited | shares	(3)	[1]
Unvested, Ending Balance | shares	152	[1]
Expected to vest at end of period | shares	269	[1]
Weighted Average Grant Date Fair Value
Unvested, Beginning Balance | $ / shares	$ 37.28
Granted | $ / shares	92.14
Performance adjustment | $ / shares	14.13	[2]
Vested | $ / shares	14.13
Forfeited | $ / shares	79.26
Unvested, Ending Balance | $ / shares	57.95
Expected to vest at end of period | $ / shares	$ 43.50
Weighted Average Remaining Vesting Period (in years)
Unvested at end of period	11 months 1 day
Expected to vest at end of period	11 months 1 day
Aggregate Intrinsic Value
Unvested at end of period | $	$ 13,477	[3]
Expected to vest at end of period | $	$ 23,769	[3]

[1] The unvested PSUs are shown in this table at target, except for the number of shares vested, which reflects the number of shares earned and expected to be issued. As of December 31, 2019, the maximum number of PSUs available to be earned was approximately 305 thousand.

[2] The amount shown represents performance adjustments for performance-based awards granted on March 30, 2016. These units vested at 200% during 2019 based on the achievement of cumulative Non-GAAP EPS during the performance period of fiscal years 2016 through 2018.

[3] The aggregate intrinsic value is calculated based on the fair value of $88.44 per share of the Company’s common stock on December 31, 2019 due to the fact that the performance stock units carry a $0 purchase price.