Operating Segments (Schedule of Net Sales by Geographic Region) (Details) (Net sales [Member], Geographic Concentration Risk [Member])	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Unites States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	84.00%	74.00%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	10.00%	16.00%
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	6.00%	10.00%