Consolidated Balance Sheets - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 461,566,000	$ 568,745,000
Accounts receivable, net of allowances for doubtful accounts	331,326,000	296,554,000
Contract with Customer, Asset, after Allowance for Credit Loss, Current	(234,505,000)	(184,847,000)
Inventory	209,798,000	184,375,000
Other Assets, Current	68,464,000	62,539,000
Total Current Assets	1,305,659,000	1,297,060,000
Other Assets:
Property and Equipment, at cost	2,285,896,000	2,435,840,000
Less accumulated depreciation	1,861,603,000	1,997,391,000
Net Property and Equipment	424,293,000	438,449,000
Goodwill	34,214,000	34,339,000
Other non-current assets	137,286,000	122,224,000
Operating Lease, Right-of-Use Asset	337,554,000	139,611,000
Assets, Noncurrent	509,054,000	296,174,000
Total Assets	2,239,006,000	2,031,683,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Operating Lease, Liability, Noncurrent	293,482,000	151,842,000
Current Liabilities:
Accounts payable	156,064,000	148,018,000
Accrued liabilities	411,781,000	307,446,000
Contract with Customer, Liability, Current	164,631,000	112,950,000
Total Current Liabilities	732,476,000	568,414,000
Long-term Debt	477,058,000	700,973,000
Other Long-term Liabilities	101,907,000	84,650,000
Commitments and Contingencies
Stockholders' Equity:
Common Stock, par value $0.25	27,709,000	27,709,000
Additional paid-in capital	131,774,000	155,858,000
Treasury Stock, Common, Value	(574,380,000)	(605,553,000)
Retained earnings	1,425,257,000	1,327,854,000
Accumulated other comprehensive income	(382,340,000)	(386,127,000)
Total Shareholders' Equity	628,020,000	519,741,000
Noncontrolling Interest in Variable Interest Entity	6,063,000	6,063,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	634,083,000	525,804,000
Total Liabilities and Sharesholders' Equity	$ 2,239,006,000	$ 2,031,683,000