SENIOR NOTES PAYABLE AND OTHER DEBT - Indebtedness of Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations
2022	$ 584,920
2023	532,176
2024	1,691,424
2025	2,116,090
2026	1,059,468
Thereafter	6,409,417
Total maturities	12,393,495	$ 12,093,138
Unrestricted cash and cash equivalents	127,073	$ 149,725
Unsecured Revolving Credit Facility and Commercial Paper
Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations
2022	335,300
2023	0
2024	0
2025	45,594
2026	0
Thereafter	0
Total maturities	380,894
Remaining borrowing capacity	253,800
Principal Amount Due at Maturity
Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations
2022	222,596
2023	489,206
2024	1,654,004
2025	2,039,042
2026	1,034,759
Thereafter	6,271,898
Total maturities	11,711,505
Scheduled Periodic Amortization
Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations
2022	27,024
2023	42,970
2024	37,420
2025	31,454
2026	24,709
Thereafter	137,519
Total maturities	$ 301,096

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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