Significant Accounting Policies (Concentraction of Credit Risk) (Details Textuals) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Sales Revenue [Member]	Dec. 31, 2010 Sales Revenue [Member]	Dec. 31, 2012 CustomerA [Member]	Dec. 31, 2010 CustomerA [Member]	Dec. 31, 2011 CustomerB [Member]	Dec. 31, 2010 CustomerB [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage				10.00%	14.50%	10.50%	10.60%	12.30%	10.20%
Allowance for Doubtful Accounts Receivable, Current	$ 535	$ 405	$ 163