Supplemental Financial Statement Information (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Cash interest paid	$ 106,942	$ 115,143
Cash income tax payments, net of refunds	2,451	19,861
Finance leased assets obtained in exchange for new lease obligations	$ 25,882	$ 3,614

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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