Long-Term Debt (Schedule of Maturities of Long-Term Debt) (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Maturities of Long-term Debt [Abstract]
2022	$ 450,000
2023	33,300
2024	0
2025	417,000
2026	0
Thereafter	5,956,860
Total long-term debt	6,857,160
Subsidiaries [Member]
Maturities of Long-term Debt [Abstract]
2022	0
2023	0
2024	0
2025	17,000
2026	0
Thereafter	4,806,860
Total long-term debt	4,823,860
Parent Company [Member]
Maturities of Long-term Debt [Abstract]
2022	450,000
2023	33,300
2024	0
2025	400,000
2026	0
Thereafter	1,150,000
Total long-term debt	$ 2,033,300

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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