Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Data [Abstract]
Net revenues	$ 777,857	$ 690,925	$ 693,227	$ 662,677	$ 734,584	$ 668,736	$ 673,987	$ 658,773	$ 2,824,686	$ 2,736,080	$ 2,646,154
Gross margin	655,918	584,988	583,915	560,219	634,868	570,565	566,796	558,962	2,385,040	2,331,191	2,172,114
Income from continuing operations	(283,889)	126,720	108,829	70,325	178,575	111,737	106,289	73,254	21,985	469,855	215,133
Income (loss) from continuing operations									570,997	560,164	202,792
(Loss) income from discontinued operations, net of income taxes	0	0	0	(42,704)	21,275	20,164	14,609	10,209	(42,704)	66,257	104,228
Net income	$ (283,889)	$ 126,720	$ 108,829	$ 27,621	$ 199,850	$ 131,901	$ 120,898	$ 83,463	$ (20,719)	$ 536,112	$ 319,361
Income (loss) from continuing operations (USD per share)	$ (1.93)	$ 0.84	$ 0.72	$ 0.46	$ 1.15	$ 0.72	$ 0.69	$ 0.47	$ 0.15	$ 3.03	$ 1.35
Loss from discontinued operations (USD per share)	0.00	0.00	0.00	(0.28)	0.13	0.13	0.09	0.07	(0.28)	0.43
Basic net earnings per share (USD per share)	(1.93)	0.84	0.72	0.18	1.28	0.85	0.78	0.54	(0.13)	3.46	2.01
Income (loss) from continuing operations (USD per share)	(1.93)	0.82	0.70	0.44	1.13	0.71	0.68	0.47	0.14	2.99	1.34
Loss from discontinued operations (USD per share)	0.00	0.00	0.00	(0.27)	0.13	0.13	0.09	0.07	(0.27)	0.42
Diluted net earnings per share (USD per share)	$ (1.93)	$ 0.82	$ 0.70	$ 0.17	$ 1.26	$ 0.84	$ 0.77	$ 0.54	$ (0.13)	$ 3.41	$ 1.99