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Supplemental Unaudited Quarterly Financial Information Consolidated Balance Sheet (Parenthetical) (Details) (USD $)
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]          
Common stock par value (USD per share) $ 5,000 $ 5,000 $ 5,000 $ 5,000 $ 5,000
Common stock shares authorized (in shares) 1,000 1,000 1,000 1,000 1,000
Common stock shares issued (in shares) 500 500 500 500 500