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Intangible Assets and Goodwill - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 9,000	$ 9,000	$ 18,021	$ 18,021
Goodwill	$ 55,053		$ 55,053		$ 55,053
Number of operating segments \| segment			1
Developed product rights for Auryxia
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated useful life			6 years

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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