CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities:
Net income	$ 416,724	$ 556,446	$ 387,891
Items included in net income not affecting cash flows:
Depreciation and amortization	149,440	129,038	110,388
Loss on write-down of vessels and other assets	8,700		1,697
Amortization of debt discount and other deferred financing costs	4,110	5,623	5,224
Amortization of time charter hire contracts acquired			842
Deferred financing costs write-off		2,686	1,266
Stock compensation	9,000	8,518	6,746
Equity in results of affiliated companies	(241)	20	(10,297)
Other - net	(312)	(2,562)	(2,242)
Items included in net income related to investing and financing activities:
Gain on disposal of vessels and other assets, net	(41,357)	(35,934)	(21,344)
Loss on extinguishment of debt		1,323
Loss on sale of investment in affiliated companies			9,513
Cash distributions from affiliated companies			3,111
Payments for drydocking	(58,642)	(34,539)	(43,327)
Insurance claims proceeds related to vessel operations	1,073	3,156	5,301
Changes in operating assets and liabilities:
Decrease in receivables	61,644	42,610	(182,679)
Increase in deferred revenue	1,590	3,283	2,609
Purchase of insurance contract in connection with settlement of pension plan obligations	(3,649)
Net change in inventories, prepaid expenses and other current assets and accounts payable, accrued expense, and other current and long-term liabilities	(942)	8,734	13,102
Net cash provided by operating activities	547,138	688,402	287,801
Cash Flows from Investing Activities:
Expenditures for vessels, vessel improvements and vessels under construction, including deposits for acquisitions	(278,794)	(205,159)	(115,976)
Security deposits for vessel exchange transactions	(5,000)
Proceeds from disposal of vessels and other property, net	71,895	66,002	99,157
Expenditures for other property	(1,386)	(1,471)	(710)
Pool working capital deposits	(1,732)	(3,639)	1,362
Proceeds from sale of investment in affiliated companies			138,966
Investments in short term time deposits	(125,000)	(235,000)	(105,000)
Proceeds from maturities of short term time deposits	185,000	255,000	25,000
Net cash used in investing activities	(155,017)	(124,267)	42,799
Cash Flows from Financing Activities:
Borrowings on long term debt, net of lenders' fees			641,050
Borrowings on revolving credit facilities	120,000	50,000
Repayments on revolving credit facilities	(70,000)	(50,000)
Repayments of debt	(39,851)	(382,050)	(798,740)
Premium and fees on extinguishment of debt		(1,323)
Proceeds from sale and leaseback financing, net of issuance and deferred financing costs		169,717	108,005
Payments on sale and leaseback financing and finance lease	(49,294)	(135,965)	(39,240)
Payments of deferred financing costs	(5,759)	(3,577)	(909)
Cash dividends paid	(284,416)	(308,154)	(69,841)
Repurchases of common stock	(25,000)	(13,948)	(20,017)
Cash paid to tax authority upon vesting or exercise of stock-based compensation	(7,055)	(5,819)	(6,097)
Net cash used in financing activities	(361,375)	(681,119)	(185,789)
Net increase/(decrease) in cash and cash equivalents	30,746	(116,984)	144,811
Cash, cash equivalents and restricted cash at beginning of year	126,760	243,744	98,933
Cash, cash equivalents and restricted cash at end of period	$ 157,506	$ 126,760	$ 243,744