Derivative Financial Instruments and Hedging Activities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		3 Months Ended
	Jun. 30, 2013 contract	Jun. 30, 2012	Jun. 30, 2012 Maximum [Member]
Notional Amount of Foreign Currency Fair Value Hedge Derivatives		$ 742
Number Of Foreign Currency Transactions Engaged In During Period	0
Gain (Loss) on Derivative Instruments, Net, Pretax			$ 100