Stock-Based Compensation (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Stock-Based Compensation
Stock-based compensation expense	$ 2,700	$ 2,400
Proceeds from exercise of stock options	$ 491	$ 2,512
Common Stock
Stock-Based Compensation
Exercise of stock options (in shares)	41	268
Common Stock \| Restricted Stock Units
Stock-Based Compensation
Exercise of stock options (in shares)	100	300

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Number of share options (or share units) exercised during the current period.

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