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Segment Reporting (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting [Abstract]          
Assets, Net $ 1,084,257us-gaap_AssetsNet     $ 2,974,056us-gaap_AssetsNet  
Cash and cash equivalents 270,861us-gaap_CashAndCashEquivalentsAtCarryingValue 206,690us-gaap_CashAndCashEquivalentsAtCarryingValue 206,690us-gaap_CashAndCashEquivalentsAtCarryingValue 125,440us-gaap_CashAndCashEquivalentsAtCarryingValue 175,012us-gaap_CashAndCashEquivalentsAtCarryingValue
Deferred Tax Assets, Net (51,569)us-gaap_DeferredTaxAssetsLiabilitiesNet (521,060)us-gaap_DeferredTaxAssetsLiabilitiesNet      
Other assets 100,300us-gaap_OtherAssets 120,469us-gaap_OtherAssets      
TOTAL ASSETS $ 1,455,418us-gaap_Assets $ 2,885,978us-gaap_Assets