Share-Based Compensation - Share Based Compensation Expense By Type (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-Based Compensation
Total share-based compensation expense	$ 62,061	$ 62,976	$ 60,450
Unrecognized compensation cost	93,551
Stock options
Share-Based Compensation
Total share-based compensation expense	5,473	6,536	6,381
Unrecognized compensation cost	$ 4,535
Weighted-average amortization period - years	1 year 11 months 23 days
RSUs
Share-Based Compensation
Total share-based compensation expense	$ 54,931	49,803	39,520
Unrecognized compensation cost	$ 88,220
Weighted-average amortization period - years	2 years 9 months 7 days
Performance-Contingent Awards - RSAs and RSUs
Share-Based Compensation
Total share-based compensation expense	$ 763	3,943	12,717
Unrecognized compensation cost	$ 795
Weighted-average amortization period - years	2 years 4 months 13 days
ESPP
Share-Based Compensation
Total share-based compensation expense	$ 894	$ 2,694	1,768
Unrecognized compensation cost	$ 1
Weighted-average amortization period - years	8 months 12 days
Theravance \| RSAs
Share-Based Compensation
Total share-based compensation expense			$ 64

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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