Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash Flows From Operating Activities:
Net income	$ 95,435	$ 77,565
Impacts of noncash items:
Depreciation and amortization	27,525	23,012
Deferred income taxes and other changes	2,272	1,854
Stock-based compensation expense	5,423	5,264
Pension plan activity	96	(330)
Changes in operating assets and liabilities:
Receivables	14,779	8,577
Inventories	73	5,289
Other current assets	(413)	(517)
Accounts payable and accrued liabilities	(3,667)	19,726
Net cash provided by operating activities	141,523	140,440
Cash Flows From Investing Activities:
Payments for property additions	(37,136)	(56,486)
Proceeds from sale of property	0	1,159
Other-net	(3,080)	(449)
Net cash used in investing activities	(40,216)	(55,776)
Cash Flows From Financing Activities:
Payment of dividends	(48,255)	(45,529)
Purchase of treasury stock	(6,692)	(209)
Tax withholdings for stock-based compensation	(3)	(2,418)
Principal payments for finance leases	(982)	(1,304)
Net cash used in financing activities	(55,932)	(49,460)
Net change in cash and equivalents	45,375	35,204
Cash and equivalents at beginning of year	88,473	60,283
Cash and equivalents at end of period	133,848	95,487
Supplemental Disclosure of Operating Cash Flows:
Net cash payments for income taxes	$ 14,278	$ 22,977