Long Term Debt (Detail) (USD $)
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Sep. 30, 2013
|
Dec. 31, 2012
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Debt Instrument [Line Items] | ||
Long-term debt including current portion | $ 70,900,000 | $ 102,700,000 |
Current portion of long-term obligations | (34,855,000) | (35,807,000) |
Total | 36,000,000 | 66,900,000 |
Series A Notes [Member]
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Debt Instrument [Line Items] | ||
Long-term debt including current portion | 0 | 20,000,000 |
Series B Notes [Member]
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Debt Instrument [Line Items] | ||
Long-term debt including current portion | 20,000,000 | 20,000,000 |
Term Loan [Member]
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Debt Instrument [Line Items] | ||
Long-term debt including current portion | 48,000,000 | 57,000,000 |
Promissory Notes
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Debt Instrument [Line Items] | ||
Long-term debt including current portion | $ 2,900,000 | $ 5,700,000 |