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Investment in Other Affiliates Additional Information (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | 20 Months Ended | ||
|---|---|---|---|---|---|---|
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Jun. 30, 2014
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Jun. 30, 2013
|
Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
Eicher -Polaris Private Limited
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Jun. 30, 2014
Eicher -Polaris Private Limited
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| Investments in and Advances to Affiliates [Line Items] | ||||||
| Equity method investment ownership percentage | 50.00% | 50.00% | ||||
| Period for proportionate share of income (loss) to be reflected in consolidated financials | 1 month | |||||
| Joint venture investment | $ 50,000,000 | |||||
| Investment maturity period | 3 years | |||||
| Payments to Acquire Businesses and Interest in Affiliates | 13,591,000 | |||||
| Income (Loss) from Equity Method Investments | $ (967,000) | $ (586,000) | $ (1,863,000) | $ (998,000) | ||