|
General (Details 2) (USD $)
|
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
|
| Derivative Instruments | ||||
| Period for which certain forecasted foreign currency rent and salary payments are hedged | 12 months | |||
| Notional amount of foreign currency forward contracts and options outstanding | $ 7,700,000 | $ 7,700,000 | ||
| Net fair value balance of foreign currency forward contracts and options outstanding | 300,000 | 300,000 | ||
| Fair value asset balance of foreign currency forward contracts and options outstanding | 300,000 | 300,000 | ||
| Fair value liability balance of foreign currency forward contracts and options outstanding | 0 | 0 | ||
| Period expected to be recognized in results of operations | 12 months | |||
| Hedging gain (loss) recognized in operations | 214,000 | (302,000) | 695,000 | (542,000) |
| Amount of cash in bank accounts with the counterparty the entity has agreed to maintain | $ 1,700,000 | $ 1,700,000 | ||