Debt Obligations (Schedule of Long Term Obligations) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total long term obligations	$ 1,273,787		$ 1,299,363
Unsecured Debt	697,213		697,162
Convertible Debt	256,118	$ (255,861)	231,646
Other Long-term Debt	10,456		10,555
Less: current portion	(631)		(628)
Total long term obligations, net	1,273,156		1,298,735
Revolving credit facility [Member]
Debt Instrument [Line Items]
Total long term obligations	310,000		360,000
line of credit, increase in maximum borrowing capacity	$ 800,000		$ 600,000

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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