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Other Current Assets Schedule of Other Current Assets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Assets, Current [Abstract]    
Notes receivable, net of allowances $ 3,966us-gaap_NotesAndLoansReceivableNetCurrent $ 3,961us-gaap_NotesAndLoansReceivableNetCurrent
Prepaid expenses 19,653us-gaap_PrepaidExpenseCurrent 12,280us-gaap_PrepaidExpenseCurrent
Other current assets 5,245us-gaap_OtherAssetsMiscellaneousCurrent 3,081us-gaap_OtherAssetsMiscellaneousCurrent
Total $ 28,864us-gaap_OtherAssetsCurrent $ 19,322us-gaap_OtherAssetsCurrent