Shareholders' Equity (Detail Textuals 1) (USD $)	3 Months Ended
	Mar. 31, 2013
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Exercise of stock options	$ 91,000
Option Holder | Stock Options
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of options elected to exercise	15,000
Exercise of stock options	70,000
Tax benefit associated with option exercised	$ 21,000