CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 249,339	$ 199,448
Short-term marketable securities	368,013	366,474
Accounts receivable (net of allowances of $11,180 as of September 30, 2025, and $12,118 as of December 31, 2024)	204,090	249,530
Prepaid expenses	53,101	49,869
Other current assets	63,755	71,001
Total current assets	938,298	936,322
Other assets
Long-term marketable securities	479,429	345,946
Property, plant and equipment (less accumulated depreciation and amortization of $940,670 as of September 30, 2025, and $905,512 as of December 31, 2024)	471,000	488,816
Goodwill	409,192	412,173
Intangible assets, net	236,357	258,006
Deferred income taxes	72,871	111,397
Miscellaneous assets	279,979	288,819
Total assets	2,887,126	2,841,479
Current liabilities
Accounts payable	130,908	123,606
Accrued payroll and other related liabilities	162,255	177,859
Unexpired subscriptions revenue	197,940	187,082
Accrued expenses and other	124,386	124,982
Total current liabilities	615,489	613,529
Other liabilities
Pension and postretirement benefits obligation	208,691	214,641
Other	82,694	86,100
Total other liabilities	291,385	300,741
Common stock of $.10 par value:
Additional paid-in capital	385,890	356,450
Retained earnings	2,450,139	2,325,142
Common stock held in treasury, at cost	(516,952)	(406,446)
Accumulated other comprehensive loss, net of income taxes:
Foreign currency translation adjustments	(4,754)	(2,762)
Funded status of benefit plans	(354,129)	(363,874)
Net unrealized gain on available-for-sale securities	2,095	830
Total accumulated other comprehensive loss, net of income taxes	(356,788)	(365,806)
Total stockholders’ equity	1,980,252	1,927,209
Total liabilities and stockholders’ equity	2,887,126	2,841,479
Class A Common Stock
Common stock of $.10 par value:
Common stock value	17,885	17,791
Class B Common Stock
Common stock of $.10 par value:
Common stock value	$ 78	$ 78