Segment and Geographic Information (Geographic Information for Sales to External Customers and Long-lived Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales	$ 1,135,871	$ 1,253,227	$ 998,576	$ 1,027,676	$ 951,625	$ 1,004,165	$ 939,047	$ 864,647	$ 4,415,350	[1]	$ 3,759,484	[1]	$ 3,571,041	[1]
Long-lived assets	2,757,557				2,088,014				2,757,557		2,088,014
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales									3,596,091	[1]	3,404,378	[1]	3,176,202	[1]
Long-lived assets	2,319,572				2,081,091				2,319,572		2,081,091
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales									217,567	[1]	214,162	[1]	294,643	[1]
GERMANY
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales									198,921	[1]	3,942	[1]	2,392	[1]
Long-lived assets	417,702				0				417,702		0
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales									89,214	[1]	54,637	[1]	32,927	[1]
Other Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net external sales									313,557	[1]	82,365	[1]	64,877	[1]
Long-lived assets	$ 20,283				$ 6,923				$ 20,283		$ 6,923

[1] Revenues are attributed to countries based on location of customer.