Earnings (Loss) Per Share - Reconciliation of the Numerator and Denominator of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator [Abstract]
Net income (loss)		$ (42,417)	$ 13,920	$ (212,013)	$ 36,271
Net income allocated to unvested restricted stock			(63)		(140)
Net income (loss) allocated to shares of Common Stock		$ (42,417)	$ 13,857	$ (212,013)	$ 36,131
Denominator [Abstract]
Shares used for basic income (loss) per share		48,783	47,923	48,702	45,996
Effect of dilutive stock options and restricted stock units outstanding [Abstract]
Shares used for diluted income (loss) per share	[1]	48,783	48,584	48,702	46,585
Earnings (loss) per share, Basic		$ (0.87)	$ 0.29	$ (4.35)	$ 0.79
Earnings (loss) per share, Diluted	[1]	$ (0.87)	$ 0.29	$ (4.35)	$ 0.78
Non-Qualified Stock Options
Effect of dilutive stock options and restricted stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)			64		94
Restricted Stock Units (RSUs)
Effect of dilutive stock options and restricted stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)			597		495
Market-based stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)		150		66
Non-Qualified Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)		137	70	181	74
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)		659	276	582	207
Restricted Stock Awards
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)		19	156	30	94
Performance-Based Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)		27		52

[1] The impact of potentially dilutive securities for the three and nine months ended September 30, 2020 was not considered because the impact would be anti-dilutive.