Organization and Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Consolidated net income (loss)	$ (64,086)	$ (37,153)	$ 65,234
Denominator for basic and diluted net (loss) income per share:
Weighted average common shares outstanding for basic	51,589	51,416	51,956
Dilutive potential common stock outstanding:
Weighted average common shares outstanding for diluted	51,589	51,416	53,160
Basic net (loss) income per share	$ (1.24)	$ (0.72)	$ 1.26
Diluted net (loss) income per share	$ (1.24)	$ (0.72)	$ 1.23
Senior Convertible Notes [Member]
Dilutive potential common stock outstanding:
Incremental common shares from share based payments			531
Stock Options and ESPP [Member]
Dilutive potential common stock outstanding:
Incremental common shares from share based payments			15
RSUs and PRSUs [Member]
Dilutive potential common stock outstanding:
Incremental common shares from share based payments			658