Condensed Consolidated Balance Sheets (Parenthetical) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013 USD ($)	Jun. 30, 2013 EUR (€)	Dec. 31, 2012 USD ($)		Dec. 31, 2012 EUR (€)
Statement Of Financial Position [Abstract]
Euro deferred shares, nominal value		€ 22			€ 22	[1]
Euro deferred shares, authorized shares	10,000	10,000	10,000	[1]	10,000	[1]
Euro deferred shares, issued shares				[1]		[1]
Euro deferred shares, outstanding Shares				[1]		[1]
Ordinary shares, par value	$ 0.01		$ 0.01	[1]
Ordinary shares, Authorized shares	100,000,000	100,000,000	100,000,000	[1]	100,000,000	[1]
Ordinary shares, issued shares	17,679,182	17,679,182	17,679,182	[1]	17,679,182	[1]
Ordinary shares, outstanding shares	17,679,182	17,679,182	17,679,182	[1]	17,679,182	[1]

[1] Amounts have been derived from the December 31, 2012 audited consolidated financial statements.