Debt And Interest Expense (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following table summarizes information related to our Senior notes:

	Issuance Date	Maturity Date	Interest Rate		Principal
					As of December 31,
					2021		2020
					(in thousands except interest rates)
Senior notes due 2023	April 16, 2013	May 1, 2023	4.625	%	$	—	$	750,000
Senior notes due 2025	March 27, 2015	April 1, 2025	5.250	%	500,000		500,000
Senior notes due 2027	July 5, 2017	July 15, 2027	4.750	%	550,000		550,000
Senior notes due 2031	June 8, 2021	June 15, 2031	2.700	%	750,000		—
Principal amount of senior notes					1,800,000		1,800,000
Less: unamortized issuance costs					(14,291)		(9,917)
Total senior notes					$	1,785,709	$	1,790,083