Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 568,745,000	$ 538,114,000
Accounts receivable, net of allowances for doubtful accounts	296,554,000	262,960,000
Contract with Customer, Asset, after Allowance for Credit Loss, Current	(184,847,000)	(164,847,000)
Inventory	184,375,000	153,682,000
Other Assets, Current	62,539,000	68,400,000
Total Current Assets	1,297,060,000	1,188,003,000
Other Assets:
Property and Equipment, at cost	2,435,840,000	2,452,421,000
Less accumulated depreciation	1,997,391,000	1,962,825,000
Net Property and Equipment	438,449,000	489,596,000
Goodwill	34,339,000	34,908,000
Other non-current assets	122,224,000	104,255,000
Operating Lease, Right-of-Use Asset	139,611,000	146,097,000
Assets, Noncurrent	296,174,000	285,260,000
Total Assets	2,031,683,000	1,962,859,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Operating Lease, Liability, Noncurrent	151,842,000	158,503,000
Current Liabilities:
Accounts payable	148,018,000	122,327,000
Accrued liabilities	307,446,000	290,659,000
Contract with Customer, Liability, Current	112,950,000	88,175,000
Total Current Liabilities	568,414,000	501,161,000
Long-term Debt	700,973,000	702,067,000
Other Long-term Liabilities	84,650,000	90,104,000
Commitments and Contingencies
Stockholders' Equity:
Common Stock, par value $0.25	27,709,000	27,709,000
Additional paid-in capital	$ 155,858,000	$ 173,608,000
Treasury stock, shares	10,574,563	11,033,098
Treasury Stock, Common, Value	$ (605,553,000)	$ (631,811,000)
Retained earnings	1,327,854,000	1,301,913,000
Accumulated other comprehensive income	(386,127,000)	(366,458,000)
Total Shareholders' Equity	519,741,000	504,961,000
Noncontrolling Interest in Variable Interest Entity	6,063,000	6,063,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	525,804,000	511,024,000
Total Liabilities and Sharesholders' Equity	$ 2,031,683,000	$ 1,962,859,000