Operating Segments (Schedule of Net Sales by Geographic Region) (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Unites States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	75.00%	70.00%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	16.00%	21.00%
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9.00%	9.00%