Significant Accounting Policies (Schedule of Fair Value Assumptions and Methodology) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Risk-free interest rate	2.00%	2.24%	1.38%
Dividend yield	0.60%	0.50%	0.80%
Volatility factors	48.80%	48.20%	47.90%
Weighted-average expected life	8 years	8 years	8 years