Accumulated Other Comprehensive Loss (Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 875,449	$ 891,898	$ 2,689,849	$ 2,525,658
Interest expense, net	(24,312)	(27,175)	(73,816)	(79,504)
Selling, general and administrative expense	(225,024)	(238,618)	(699,316)	(720,882)
Total before tax	6,970	11,327	(8,886)	(200,531)
Income tax (benefit) provision	(1,525)	554	(10,602)	7,540
Net of tax	9,067	11,389	(2,618)	(200,423)
Reclassification out of Accumulated Other Comprehensive Loss | Cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	45	(104)	289	(107)
Cost of sales	(21)	(6)	(126)	36
Interest expense, net	(133)	0	(229)	0
Total before tax	(109)	(110)	(66)	(71)
Income tax (benefit) provision	(28)	(27)	(17)	(18)
Net of tax	(81)	(83)	(49)	(53)
Reclassification out of Accumulated Other Comprehensive Loss | Available for sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	(2)	6,490	(2)	10,060
Selling, general and administrative expense	(183)	263	76	210
Total before tax	(185)	6,753	74	10,270
Income tax (benefit) provision	(45)	1,681	19	2,557
Net of tax	(140)	5,072	55	7,713
Reclassification out of Accumulated Other Comprehensive Loss | Pension and postretirement benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(12,703)	(12,037)	(39,344)	(38,436)
Income tax (benefit) provision	(3,097)	(2,875)	(9,608)	(9,027)
Net of tax	(9,606)	(9,162)	(29,736)	(29,409)
Reclassification out of Accumulated Other Comprehensive Loss | Transition credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension and postretirement benefit plans	0	1	0	3
Reclassification out of Accumulated Other Comprehensive Loss | Prior service costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension and postretirement benefit plans	(84)	(140)	(254)	(417)
Reclassification out of Accumulated Other Comprehensive Loss | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension and postretirement benefit plans	(12,619)	(10,990)	(38,776)	(32,923)
Reclassification out of Accumulated Other Comprehensive Loss | Settlement
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension and postretirement benefit plans	$ 0	$ (908)	$ (314)	$ (5,099)