Segment and Geographic Area Information Net Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 921,699	$ 777,748	$ 853,874	$ 821,629	$ 857,789	$ 754,866	$ 737,258	$ 722,063	$ 3,374,950	$ 3,071,976	$ 2,677,203
United States
Segment Reporting Information [Line Items]
Net sales									887,416	840,589	797,267
Foreign
Segment Reporting Information [Line Items]
Net sales									$ 2,487,534	$ 2,231,387	$ 1,879,936
Korea
Segment Reporting Information [Line Items]
Percent of total net sales									13.00%
China
Segment Reporting Information [Line Items]
Percent of total net sales									12.00%	15.00%	13.00%
Japan
Segment Reporting Information [Line Items]
Percent of total net sales									10.00%