Segment Information Segment Information Summary of Geographic Information Regarding Net Sales (Details) - USD ($) $ 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
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 436,716	$ 426,504	$ 429,663	$ 437,525	$ 425,568	$ 435,320	$ 436,671	$ 437,204	$ 1,730,408	$ 1,734,763	$ 1,752,401
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,650,066	1,663,231	1,653,208
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									48,604	44,970	59,463
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									12,106	6,831	6,896
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									7,124	5,260	10,016
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									4,255	4,790	5,578
Other foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 8,253	$ 9,681	$ 17,240