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Restructuring and integration expense (accruals) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Charges	$ 13,894	$ 18,923	$ 41,085	$ 57,788
Employee severance benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance, December 31, 2020			6,798
Charges			4,690
Reversals			(1,523)
Payments			(8,632)
Balance, September 30, 2021	$ 1,333		$ 1,333