Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	2 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Statement of Cash Flows [Abstract]
Net income (loss)	$ 3,659	$ 17,512
Adjustments to reconcile net income to net cash and restricted cash provided by operating activities:
Depreciation	59,853	56,064
Amortization of deferred financing costs	2,446	2,252
Amortization of lease premiums, discounts and incentives	3,669	3,632
Deferred income taxes	1,453	0
Non-cash share-based payment expense	10,678	1,602
Cash flow hedges reclassified into earnings	0	(184)
Proceeds from Collection of Finance Receivables	5,658	4,235
Security deposits and maintenance payments included in earnings	(47,293)	365
Gain on sale of flight equipment	(15,354)	(4,173)
Gain (Loss) on Extinguishment of Debt	(3,955)	0
Impairment of flight equipment	62,657	0
Provision for Loan and Lease Losses	288
Other	(114)	(1,780)
Changes in certain assets and liabilities:
Accounts receivable	(6,377)	(2,891)
Other assets	5,786	(10,300)
Accounts payable, accrued expenses and other liabilities	10,205	16,656
Lease rentals received in advance	143	238
Net cash and restricted cash provided by operating activities	101,024	83,596
Cash flows from investing activities:
Acquisition and improvement of flight equipment	(23,035)	(66,616)
Proceeds from sale of flight equipment	103,679	1,707
Aircraft purchase deposits and progress payments, net of returned deposits and aircraft sales deposits	(4,614)	17,198
Unconsolidated equity method investments and associated costs	0	3,450
Other	(56)	691
Net cash and restricted cash provided by (used in) investing activities	75,974	(50,470)
Cash flows from financing activities:
Repurchase of shares	(2,370)	(11,424)
Proceeds from secured and unsecured debt financings	100,000	0
Repayments of secured and unsecured debt financings	(268,799)	(60,716)
Payment for Debt Extinguishment or Debt Prepayment Cost	2,685	0
Deferred financing costs	0	(368)
Security deposits and maintenance payments received	29,806	30,106
Security deposits and maintenance payments returned	(16,956)	(25,286)
Dividends paid	0	8
Net cash and restricted cash used in financing activities	(161,004)	(67,680)
Net increase (decrease) in cash and restricted cash:	15,994	(34,554)
Cash and restricted cash at beginning of period	155,443	167,853
Cash and restricted cash at end of period	171,437	133,299
Unrestricted and restricted cash and cash equivalents	171,437	133,299
Supplemental disclosures of cash flow information:
Cash paid for interest	21,487	19,316
Cash (received) paid for income taxes	(15)	(1,585)
Supplemental disclosures of non-cash investing activities:
Advance lease rentals, security deposits, maintenance payments, other liabilities and other assets assumed in asset acquisitions	7,873	3,749
Advance lease rentals, security deposits, maintenance payments, other liabilities and other assets settled in sale of flight equipment	16,693	656
Transfers from flight equipment held for lease to Net investment in leases and Other assets	$ 31,821	$ 42,709