Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net (loss) income	$ (1,274)	$ 9,658
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	47,481	47,154
Write-down of equipment	4,113	9,126
Stock-based compensation expenses	7,298	5,132
Amortization of deferred costs	2,377	2,790
Allowances and provisions	25	317
Gain on sale of leased equipment	0	(1,367)
Loss (income) from joint ventures	1,204	(1,155)
Loss on debt extinguishment	0	4,688
Loss on disposal of property, equipment and furnishings	40	0
Deferred income taxes	(2,677)	8,381
Changes in assets and liabilities:
Receivables	(16,868)	(17,936)
Inventory	2,484	4,015
Other assets	(1,796)	(562)
Accounts payable and accrued expenses	9,048	(19,551)
Maintenance reserves	(9,086)	(6,691)
Security deposits	1,052	2,272
Unearned revenue	(603)	(3,312)
Net cash provided by operating activities	42,818	42,959
Cash flows from investing activities:
Proceeds from sale of equipment (net of selling expenses)	0	17,665
Issuance of notes receivable	(42,495)	(135,955)
Payments received on notes receivable	5,558	3,738
Purchase of equipment held for operating lease	(63,791)	(76,982)
Purchase of property, equipment and furnishings	(753)	(2,178)
Net cash used in investing activities	(101,481)	(193,712)
Cash flows from financing activities:
Proceeds from debt obligations	395,700	690,200
Debt issuance costs	(4,556)	(5,806)
Principal payments on debt obligations	(175,799)	(419,526)
Debt prepayment costs	0	(2,373)
Proceeds from shares issued under stock compensation plans	169	200
Cancellation of restricted stock units in satisfaction of withholding tax	(4,966)	(1,194)
Repurchase of common stock	0	(1,379)
Preferred stock dividends	(1,621)	(1,629)
Net cash provided by financing activities	208,927	258,493
Increase in cash, cash equivalents and restricted cash	150,264	107,740
Cash, cash equivalents and restricted cash at beginning of period	78,925	63,668
Cash, cash equivalents and restricted cash at end of period	229,189	171,408
Net cash paid for:
Interest	25,914	28,486
Income Taxes	1,230	87
Supplemental disclosures of non-cash activities:
Liabilities assumed in purchase of equipment held for operating lease	0	(5,680)
Transfers from Equipment held for operating lease to Spare parts inventory	488	12,926
Transfers from Equipment held for operating lease to Equipment held for sale	9,613	0
Transfers from Spare parts inventory to Equipment held for operating lease	1,555	0
Accrued preferred stock dividends	9	9
Accrued share repurchases	$ 0	$ 111