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Noncontrolling Interests (Preferred Stockholders' Equity in Subsidiaries) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2013
Jun. 30, 2012
Dec. 31, 2012
Noncontrolling Interest [Line Items]      
Preferred Stock, Value, Issued $ 4   $ 4
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 25.00%    
Noncontrolling Interest, Ownership Percentage by Parent 75.00%    
Preferred Stock, Dividend Rate, Percentage 4.00% 4.00%  
Document Period End Date Mar. 31, 2013    
Redeemable Preferred Stock Member
     
Noncontrolling Interest [Line Items]      
Shares, Outstanding 300,000    
Preferred Stock, Value, Issued $ 300,000    
Preferred Stock, Dividend Rate, Percentage 6.125%    
Preferred stock-perpetual voting, dividend increase percentage each interval once shares become callable 50.00%