Significant Accounting Policies (Stock Option Valuation Assumptions) (Details) - $ / shares		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Significant Accounting Policies [Abstract]
Number of options granted		89,000	40,000
Weighted average exercise price		$ 11.06	$ 9.12
Weighted average fair value of options		$ 3.50	$ 3.82
Expected life in years	[1]	6 years 10 months 6 days	6 years 8 months 9 days
Expected volatility	[2]	31.91%	46.76%
Risk-free interest rate	[3]	1.79%	1.80%
Dividend yield	[4]	1.44%	1.33%

[1] The expected life of the options was estimated based on historical employee behavior and represents the period of time that options granted are expected to be outstanding.

[2] The expected volatility of the Company's stock price was based on the historical volatility over the period commensurate with the expected life of the options.

[3] The risk-free interest rate is the U.S. Treasury rate commensurate with the expected life of the options on the date of grant.

[4] The expected dividend yield is the projected annual yield based on the grant date stock price.