Supplemental Cash Flow Information details - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Interest Paid, Capitalized	$ 2,692	$ 4,633
Interest Paid	15,549	11,811
Income Taxes Paid, Net	19,216	2,869
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	7,745	17,762
Capital Expenditures Incurred but Not yet Paid	$ 1,361	$ 0