Accumulated Other Comprehensive Income (Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 842,820	$ 839,031	$ 2,500,831	$ 2,519,506
Interest expense, net	(28,601)	(22,294)	(81,877)	(62,394)
Selling, general and administrative	(304,398)	(300,983)	(908,169)	(916,981)
Income before income taxes	74,965	93,593	225,367	286,495
Benefit provision for income tax	(17,607)	(23,197)	(53,975)	(93,615)
Net income	57,358	70,105	171,392	190,929
Reclassification out of Accumulated Other Comprehensive Loss | Cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	(139)	443	(133)	(290)
Cost of sales	(59)	(301)	89	69
Interest expense, net	(507)	(507)	(1,521)	(1,521)
Income before income taxes	(705)	(365)	(1,565)	(1,742)
Benefit provision for income tax	(274)	(144)	(610)	(679)
Net income	(431)	(221)	(955)	(1,063)
Reclassification out of Accumulated Other Comprehensive Loss | Available for sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	(298)	(1,125)	(524)	(1,126)
Benefit provision for income tax	(110)	(433)	(194)	(433)
Net income	(188)	(692)	(330)	(693)
Reclassification out of Accumulated Other Comprehensive Loss | Pension and postretirement benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(10,228)	(9,206)	(30,518)	(29,153)
Benefit provision for income tax	(3,484)	(3,243)	(10,440)	(10,362)
Net income	(6,744)	(5,963)	(20,078)	(18,791)
Reclassification out of Accumulated Other Comprehensive Loss | Transition credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative	2	2	6	6
Reclassification out of Accumulated Other Comprehensive Loss | Prior service costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative	(41)	(40)	(125)	(123)
Reclassification out of Accumulated Other Comprehensive Loss | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative	$ (10,189)	$ (9,168)	$ (30,399)	$ (29,036)