Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities:
Net Income	$ 102,265	$ 57,158
Adjustments to reconcile Net Income to net cash provided by operating activities:
Depreciation and amortization	157,509	157,820
Amortization (accretion) of debt securities discount	(2)	208
Provision for (reversal of) expected credit losses	(6)	4
Loss on early extinguishment of debt	74	245
Special charge, net of cash payments	15,934	3,269
Unrealized loss (gain) on financial instruments	29,747	4,275
Loss (gain) on disposal of aircraft	(6,715)	0
Deferred taxes	39,518	(60,122)
Stock-based compensation	10,506	10,025
Changes in:
Accounts receivable	51,781	26
Prepaid expenses, current assets and other assets	(19,115)	(23,835)
Accounts payable, accrued liabilities and other liabilities	178,894	(40,076)
Net cash provided by operating activities	560,390	108,997
Investing Activities:
Capital expenditures	(25,095)	(76,754)
Payments for flight equipment and modifications	(59,919)	(99,161)
Proceeds from insurance		38,133
Proceeds from investments	881	9,313
Proceeds from disposal of aircraft	44,110	0
Net cash used for investing activities	(40,023)	(128,469)
Financing Activities:
Proceeds from debt issuance	321,518	19,723
Payment of debt issuance costs	(3,910)	(955)
Payments of debt and finance lease obligations	(274,960)	(160,091)
Proceeds from revolving credit facility	75,000	50,000
Customer maintenance reserves and deposits received	6,010	8,039
Customer maintenance reserves paid	(14,437)	0
Treasury shares withheld for payment of taxes	(3,840)	(9,227)
Net cash provided by (used for) financing activities	105,381	(92,511)
Net increase (decrease) in cash, cash equivalents and restricted cash	625,748	(111,983)
Cash, cash equivalents and restricted cash at the beginning of period	113,430	232,741
Cash, cash equivalents and restricted cash at the end of period	739,178	120,758
Noncash Investing and Financing Activities:
Acquisition of flight equipment included in Accounts payable and accrued liabilities	13,613	51,996
Acquisition of property and equipment acquired under operating leases	1,918	0
Customer maintenance reserves settled with sale of aircraft	$ 6,497	$ 0