SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Jul. 01, 2016
Accounting Policies [Line Items]
Total assets	$ 4,882,148			$ 4,882,148		$ 4,863,854
Total liabilities	4,192,877			4,192,877		3,739,754
Debt issuance cost	65,975			65,975		64,483
Amortization of deferred financing costs	7,600		$ 2,200	13,328	$ 4,489
Provision for doubtful accounts	55,600			55,600		16,900
Bad debt expense	(700)		$ (200)	47,200	(700)
Purchase deposits				7,100	$ 9,180
Finance leases, net				$ 6,500		7,600
Amortization of Lease Incentives	$ 7,500
Common stock dividends declared (in dollars per share)	$ 0.33		$ 0.33	$ 0.33	$ 0.33
Series A Preferred Shares
Accounting Policies [Line Items]
Preferred stock dividends declared (in dollars per share)	0.52
Series B Preferred Stock
Accounting Policies [Line Items]
Preferred stock dividends declared (in dollars per share)	0.50
Series C Preferred Stock
Accounting Policies [Line Items]
Preferred stock dividends declared (in dollars per share)	$ 0.52
Other Assets
Accounting Policies [Line Items]
Debt fees	$ 2,500			$ 2,500		2,900
Capitalized costs, potential asset acquisitions	37,100			37,100		46,900
Purchase deposits				7,200		13,700
Prepaid expense	26,100			26,100		21,400
Notes receivable	112,600			112,600		40,400
Maintenance right assets	9,100			9,100		5,100
Other Assets, Aviation
Accounting Policies [Line Items]
Inventory	112,700			112,700		100,300
Other Assets, Commodity Inventory
Accounting Policies [Line Items]
Inventory	$ 5,900			$ 5,900		6,800
Customer One | Customer Concentration Risk | Sales Revenue, Segment | Transtar
Accounting Policies [Line Items]
Concentration risk	20.00%			22.00%
Customer One | Customer Concentration Risk | Sales Revenue, Segment | Aviation Leasing
Accounting Policies [Line Items]
Concentration risk			10.00%		11.00%
Customer One | Customer Concentration Risk | Accounts Receivable | Transtar
Accounting Policies [Line Items]
Concentration risk	11.00%
Customer One | Customer Concentration Risk | Accounts Receivable | Aviation Leasing
Accounting Policies [Line Items]
Concentration risk	14.00%	36.00%
Customer Two | Customer Concentration Risk | Accounts Receivable | Aviation Leasing
Accounting Policies [Line Items]
Concentration risk	12.00%	13.00%
Delaware River Partners LLC | Variable Interest Entity, Primary Beneficiary
Accounting Policies [Line Items]
Ownership percentage							98.00%
Interest held in VIE, as a percentage				100.00%
Total assets	$ 331,200			$ 331,200		316,500
Total liabilities	$ 48,200			$ 48,200		$ 32,600