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Supplemental Cash Flow Information - Additional Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Continuing Operations
Cash (paid) received during the period for -
Interest paid related to continuing operations	$ (34,935)	$ (19,373)	$ (12,828)
Income taxes paid	(112,895)	(112,335)	(121,662)
Income tax refunds related to continuing operations	5,209	9,845	7,548
Discontinued Operations
Cash (paid) received during the period for -
Income taxes paid	$ 0	$ 0	$ (7,260)

X

- Definition

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

+ References

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- Definition

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.

+ References

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- Definition

The amount of cash received during the period as refunds for the overpayment of taxes.

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