| Sublease Agreement (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 
|---|---|---|
| Dec. 31, 2014 | Jun. 30, 2015 | |
| Sublease Agreement | ||
| Expected Income From Sublease | $ 7,200 | |
| Loss on sublease | $ 9,300 | |
| Changes in liability | ||
| Accretion of deferred liability | 304 | |
| Amortization of deferred liability | (1,682) | |
| Balance at the ending | $ 7,891 | 
| X | ||||||||||
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- Definition Represents the amount of accretion to the deferred liability of sublease arrangements during the period. No definition available. 
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| X | ||||||||||
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- Definition Represents the amount of amortization of deferred liability of sublease arrangements during the period. No definition available. 
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| X | ||||||||||
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- Definition Represent changes in liability related to sublease agreement. No definition available. 
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| X | ||||||||||
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- Definition Represents the information pertaining to expected income from sublease. No definition available. 
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| X | ||||||||||
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- Definition Represents the information pertaining to gain (loss) on sublease. No definition available. 
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| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred sublease arrangements. No definition available. 
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