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Segments and Major Customers (Details 2) (Customer Concentration Risk, Sales, net) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Customer A |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue | 39.00% | 38.00% | 36.00% | 38.00%
Customer B |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue |  |  |  | 10.00%

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration