Income Taxes (Details)	9 Months Ended
	Sep. 30, 2013
Effective income tax rate reconciliation [Line Items]
Statutory income tax rate (in hundredths)	34.00%
Israeli subsidiaries [Member]
Effective income tax rate reconciliation [Line Items]
Rate at which subsidiary earnings are taxed (in hundredths)	20.00%
Israeli amendment one time electives tax rates [Abstract]
Preferred income tax rate elect for 2011 (in hundredths)	15.00%
Preferred income tax rate elect for 2012 (in hundredths)	15.00%
Preferred Income Tax Rate Elect For 2013 (in hundredths)	12.50%
Preferred Income Tax Rate Elect For 2014 (in hundredths)	12.50%
Preferred Income Tax Rate Elect For 2015 and thereafter (in hundredths)	12.00%
Israeli subsidiaries [Member] | Current Period [Member]
Israeli amendment one time electives tax rates [Abstract]
Preferred income tax rate ( in hundredths)	12.50%
Standard corporate income tax rate (in hundredths)	25.00%
Israeli subsidiaries [Member] | Prospective [Member]
Israeli amendment one time electives tax rates [Abstract]
Preferred income tax rate ( in hundredths)	16.00%
Standard corporate income tax rate (in hundredths)	26.50%
UK Subsidiaries [Member]
Effective income tax rate reconciliation [Line Items]
Rate at which subsidiary earnings are taxed (in hundredths)	24.00%