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Significant Accounting Policies Distributor Revenue (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Distributor Revenue	16.30%rsys_DistributorRevenue	14.30%rsys_DistributorRevenue	16.00%rsys_DistributorRevenue