SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Disclosure Of Accounting Policies [Line Items]

Trust liabilities

$ 4,448

$ 1,555

Shipping expenses

4,496

2,863

3,945

Advertising expenses

1,011

1,252

859

Warranty term

provides product warranties for periods between twelve to eighteen months at no extra charge

Research and development expenses

3,055

3,375

3,249

Restricted cash held by trustees

1,664

1,549

Convertible debt fair value

13,937

Total weighted average number of shares related to outstanding options and RSUs excluded from the calculations of diluted net income (loss) per share

6,833,367

5,750,076

3,794,561

Fair value asset hedging instrument

$ 1,363

Short-Term [Member]

Disclosure Of Accounting Policies [Line Items]

Restricted cash weighted average interest rate

1.13%

1.29%

Long-Term [Member]

Disclosure Of Accounting Policies [Line Items]

Restricted cash weighted average interest rate

2.23%

0.47%