Significant Accounting Policies (Foreign Currency Translation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effect of Exchange Rate Changes [Line Items]
Other income (expense)	$ 188	$ 8,031	$ (274)
Gain (loss) on currency translation
Effect of Exchange Rate Changes [Line Items]
Other income (expense)	$ (780)	$ (263)	$ 137