Accumulated Other Comprehensive Income (Loss) Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	$ 965,134	$ 935,132	$ 873,415
Tax (benefit) expense	61,009	59,125	53,677
Total reclassifications for the period, net of tax	(91,332)	(87,686)	$ (81,274)
Reclassification out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	19,343	18,466
Tax (benefit) expense	(7,524)	(7,183)
Total reclassifications for the period, net of tax	11,819	11,283
Reclassification out of AOCI | Actuarial Losses Recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	21,072	19,695
Tax (benefit) expense	(8,197)	(7,661)
Total reclassifications for the period, net of tax	12,875	12,034
Reclassification out of AOCI | Prior Service Costs Recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	(1,729)	(1,229)
Tax (benefit) expense	673	478
Total reclassifications for the period, net of tax	$ (1,056)	$ (751)