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Recent Accounting Pronouncements - Narrative (Details) - USD ($)
$ in Thousands
Jan. 01, 2018
Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Adoption of new accounting standard   $ (312,571)
Retained Earnings    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Adoption of new accounting standard $ 100,567 $ (312,571)