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Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Long Lived Assets Held-for-sale [Line Items]  
Cash and cash equivalents $ 1,796,062us-gaap_CashAndCashEquivalentsAtCarryingValue
Other Assets [Member]  
Long Lived Assets Held-for-sale [Line Items]  
Cash and cash equivalents $ 15,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember