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Stock Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense and directors' fees related to stock awards $ 3.1 $ 3.9 $ 6.5
Compensation expense, non-vested awards 2.0 2.5 5.3
Shares were issued to employees, directors and officers 150,852    
Nonvested awards, total compensation cost not yet recognized $ 1.9    
Nonvested awards, total compensation cost not yet recognized, period for recognition 1 year    
Stock Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Period of predetermined peer group's total stockholder return 3 years