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Impairment of Long-lived Assets (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]      
Impairment $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse $ 212,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse $ 41,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Impairment, discontinued operations $ 40,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf $ 100,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf $ 5,100,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf