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Stock Incentive Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 07, 2012
Sep. 07, 2012
Sep. 30, 2013
Stock Options [Member]
        
Stock Incentive Plans (Textuals) [Abstract]        
Stock option and Incentive plan, shares authorized 8,000,000     8,000,000
Number of Shares Issued or Committed to Issue 3,457,829     3,457,829
Restricted Stock [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Number of shares, Beginning Balance       676,111
Number of shares, Granted       301,806
Number of shares, Additional shares from dividends       1,040
Number of shares, Forfeited       (16,934)
Number of shares, Vested       (400,722)
Number of shares, Ending Balance 561,301     561,301
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Weighted-average grant date fair value, Beginning balance (in dollars per share)       $ 10.10
Weighted-average grant date fair value, Granted (in dollars per share)       $ 9.18
Weighted-average grant date fair value, Additional shares from dividends (in dollars per share)       $ 9.30
Weighted-average grant date fair value, Forfeited       $ 9.65
Weighted-average grant date fair value, Vested (in dollars per share)       $ 9.94
Weighted-average grant date fair value, Ending balance (in dollars per share) $ 9.74     $ 9.74
Stock Incentive Plans (Textuals) [Abstract]        
Award vesting period       3 years
Restricted Stock Awards Expected to Vest Two Years from Balance Sheet Date (in shares) 270,440     270,440
Restricted Stock Awards Expected to Vest Three Years from Balance Sheet Date (in shares) 193,200     193,200
Restricted Stock Awards Expected to Vest Four Years from Balance Sheet Date (in shares) 97,661     97,661
Unrecognized compensation cost (in dollars) $ 3.9     $ 3.9
Unrecognized compensation expense related to compensation awards, period for recognition (in months)       23 months
Compensation expense (in dollars) 0.7 0.8 2.3 2.7
Compensation Expense Related to Accelerated Vesting of Awards in Connection with Retirement       0.7
Market Stock Units [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Number of shares, Beginning Balance       258,842
Number of Units, Additional units from dividends       5,104
Number of shares, Vested       (90,620)
Number of shares, Ending Balance 173,326     173,326
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Weighted-average grant date fair value, Beginning balance (in dollars per share)       $ 11.31
Weighted-Average Grant Date Fair Value, Additional units from dividends, Weighted Average Grant Date Fair Value       $ 9.75
Weighted-average grant date fair value, Vested (in dollars per share)       $ 9.86
Weighted-average grant date fair value, Ending balance (in dollars per share) $ 12.02     $ 12.02
Stock Incentive Plans (Textuals) [Abstract]        
Award vesting period       3 years
Unrecognized compensation cost (in dollars) 0.5     0.5
Unrecognized compensation expense related to compensation awards, period for recognition (in months)       14 months
Compensation expense (in dollars) 0.1 0.2 0.6 0.7
Compensation Expense Related to Accelerated Vesting of Awards in Connection with Retirement       0.2
Performance Stock Units [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Number of shares, Beginning Balance       0
Number of Units, Additional units from dividends       3,504
Number of shares, Granted       217,949
Number of shares, Ending Balance 221,453     221,453
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Weighted-average grant date fair value, Beginning balance (in dollars per share)       $ 0.00
Weighted-Average Grant Date Fair Value, Additional units from dividends, Weighted Average Grant Date Fair Value       $ 10.09
Weighted-average grant date fair value, Granted (in dollars per share)       $ 9.64
Weighted-average grant date fair value, Ending balance (in dollars per share) $ 9.65     $ 9.65
Stock Incentive Plans (Textuals) [Abstract]        
Award vesting period       3 years
Unrecognized compensation cost (in dollars) 1.7     1.7
Unrecognized compensation expense related to compensation awards, period for recognition (in months)       29 months
Compensation expense (in dollars) $ 0.2     $ 0.4
No Payout of Shares of Common Stock if Total Stockholder Return Falls Below Threshold       30.00%
Maximum Possible Payout to Executive Officer as a Percentage of the Target Award (as a percent)       150.00%
Maximum Possible Payout to Executive Officer as a Percentage of the Target Award, Percentile of Total Stockholder Return of Peer Group       75.00%