Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 14,922	$ 18,003
Property and equipment, accumulated depreciation	$ 373,954	$ 334,500
Common stock, par value (in usd per share)	$ 2	$ 2
Common stock, authorized (shares)	200,000	200,000
Common stock, issued (shares)	76,171	75,433
Common stock, outstanding (shares)	76,171	75,433