Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 75,306	$ 72,356
Impacts of noncash items:
Depreciation and amortization	13,030	11,943
Change in acquisition-related contingent consideration	993	224
Deferred income taxes and other changes	(9,732)	(153)
Stock-based compensation expense	2,313	2,155
Pension plan activity	(248)	(122)
Changes in operating assets and liabilities:
Receivables	1,561	(3,931)
Inventories	(1,283)	(3,589)
Other current assets	(6,705)	918
Accounts payable and accrued liabilities	8,720	(3,679)
Net cash provided by operating activities	83,955	76,122
Cash Flows From Investing Activities:
Cash paid for acquisitions, net of cash acquired	(318)	(34,997)
Payments for property additions	(15,287)	(11,838)
Other-net	11	94
Net cash used in investing activities	(15,594)	(46,741)
Cash Flows From Financing Activities:
Payment of dividends	(31,561)	(28,794)
Purchase of treasury stock	(853)	(8)
Tax withholdings for stock-based compensation	(284)	(152)
Net cash used in financing activities	(32,698)	(28,954)
Net change in cash and equivalents	35,663	427
Cash and equivalents at beginning of year	143,104	118,080
Cash and equivalents at end of period	178,767	118,507
Supplemental Disclosure of Operating Cash Flows:
Net cash payments for income taxes	$ 32,457	$ 37,383