Intangible Assets, Net (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012
Intangible Assets, Net [Abstract]
Estimated useful life	10 years
Estimated annual amortization expense for intangible assets subject to amortization, 2012	$ 1,402,000
Estimated annual amortization expense for intangible assets subject to amortization, 2013	1,330,000
Estimated annual amortization expense for intangible assets subject to amortization, 2014	1,330,000
Estimated annual amortization expense for intangible assets subject to amortization, 2015	1,330,000
Estimated annual amortization expense for intangible assets subject to amortization, 2016	$ 1,330,000