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Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021
Financial Instruments Measured at Fair Value on a Recurring Basis
Cash		$ 72,800		$ 72,800			$ 104,800
Cash and cash equivalents and short-term investments		1,800,000		1,800,000			2,300,000
Restricted cash		56,100		56,100			53,700
Restricted cash and cash equivalents and restricted short-term investments		1,200,000		1,200,000			1,100,000
Impairment charges		135,714	$ 0	135,714	$ 0
Investment in non-marketable equity securities	$ 10,000
Common stock of a publicly-traded entity amount	$ 8,400
Other investments		26,326	$ 75,260	26,326	$ 75,260		80,411
PBSC Urban Solutions
Financial Instruments Measured at Fair Value on a Recurring Basis
Business combination, contingent consideration arrangements, range of outcomes, value, high						$ 15,000
Reported Value Measurement | Level 3
Financial Instruments Measured at Fair Value on a Recurring Basis
Equity security						$ 128,100
Fair Value Measurements on Nonrecurring Basis
Financial Instruments Measured at Fair Value on a Recurring Basis
Cash							104,800
Money market deposits							330,300
Restricted cash		56,100		56,100			53,700
Other investments		5,800		5,800
Fair Value Measurements on Nonrecurring Basis | Cash and Cash Equivalents and Short-Term Investments
Financial Instruments Measured at Fair Value on a Recurring Basis
Cash		72,800		72,800
Money market deposits		51,300		51,300
Term deposits		15,000		15,000			385,000
Fair Value Measurements on Nonrecurring Basis | Restricted Cash and Cash Equivalents and Restricted Investments
Financial Instruments Measured at Fair Value on a Recurring Basis
Term deposits		$ 5,000		$ 5,000			$ 5,000

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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