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Shareholders' Equity (Noncontrolling Interests) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Jan. 01, 2012
Aug. 31, 2012
Aug. 30, 2012
Dec. 31, 2012
MCF
Jan. 01, 2012
MCF
Aug. 31, 2012
MCF
Apr. 24, 2012
MCF
Aug. 12, 2010
MCF
Dec. 31, 2013
SACS
Noncontrolling Interest [Line Items]                      
Non-controlling interest, as a percentage of equity                   100.00%  
Ownership percentage       100.00% 0.00%     100.00% 100.00%    
Distribution to noncontrolling interests $ 0 $ 5,758 $ 4,012     $ 5,800 $ 4,000        
Life term of contract                     25 years
Percentage of profit share of parent in joint venture                     88.75%
Percentage of profit share of noncontrolling in joint venture                     11.25%