Segments and Related Information - Reconciliation of Consolidated Income before Income Taxes to EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
EBITDA Reconciliation:
Income before income taxes	$ 140,035	$ 157,405	$ 338,290	$ 271,455
Interest expense, net	13,091	13,553	39,379	45,365
Depreciation	95,366	71,397	262,132	182,173
Amortization of intangible assets	23,352	11,200	54,522	28,384
EBITDA	$ 271,800	$ 253,600	$ 694,300	$ 527,400