Summary of Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Advertising Costs
Advertising expense	$ 817,000	$ 567,000	$ 450,000
Patents
Other Intangible Assets
Estimated useful lives using the straight-line method	17 years
Trademarks | Minimum
Other Intangible Assets
Estimated useful lives using the straight-line method	3 years
Trademarks | Maximum
Other Intangible Assets
Estimated useful lives using the straight-line method	5 years
Trade names | Minimum
Other Intangible Assets
Estimated useful lives using the straight-line method	3 years
Trade names | Maximum
Other Intangible Assets
Estimated useful lives using the straight-line method	5 years
Other intangibles | Minimum
Other Intangible Assets
Estimated useful lives using the straight-line method	3 years
Other intangibles | Maximum
Other Intangible Assets
Estimated useful lives using the straight-line method	5 years