Derivative Instruments and Hedging Activities Open Foreign Currency Contracts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2014 Cash Flow Hedging [Member] Foreign Exchange Contract [Member]	Sep. 30, 2014 Cash Flow Hedging [Member] Foreign Exchange Contract [Member] Currency, Australian Dollar	Sep. 30, 2014 Cash Flow Hedging [Member] Foreign Exchange Contract [Member] Currency, Canadian Dollar	Sep. 30, 2014 Cash Flow Hedging [Member] Foreign Exchange Contract [Member] Currency, Japanese Yen	Sep. 30, 2014 Cash Flow Hedging [Member] Foreign Exchange Contract [Member] Currency, Mexican Peso
Derivative [Line Items]
Notional Amounts (in US Dollars)		$ 131,044	$ 7,991	$ 91,050	$ 17,200	$ 14,803
Derivative, Fair Value, Net	$ 21	$ 2,554	$ 404	$ 2,826	$ (599)	$ (77)