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Stock Incentive Plans (Details) (USD $)
 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 36 Months Ended 3 Months Ended 9 Months Ended 36 Months Ended 0 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
March 3, 2013 [Member]
Sep. 30, 2014
May 15, 2013 [Member]
Sep. 30, 2014
March 3, 2014 [Member]
Sep. 30, 2014
May 15, 2014 [Member]
Sep. 30, 2014
Incentive Plan [Member]
Sep. 30, 2014
Restricted Stock [Member]
Sep. 30, 2013
Restricted Stock [Member]
Sep. 30, 2014
Restricted Stock [Member]
Sep. 30, 2013
Restricted Stock [Member]
Sep. 30, 2014
Market Stock Units [Member]
Sep. 30, 2013
Market Stock Units [Member]
Sep. 30, 2014
Market Stock Units [Member]
Sep. 30, 2013
Market Stock Units [Member]
Dec. 31, 2012
Market Stock Units [Member]
Sep. 30, 2014
Performance Stock Units [Member]
Sep. 30, 2013
Performance Stock Units [Member]
Sep. 30, 2014
Performance Stock Units [Member]
Sep. 30, 2013
Performance Stock Units [Member]
Dec. 31, 2012
Performance Stock Units [Member]
May 15, 2014
Director [Member]
Common Stock [Member]
May 15, 2014
Director [Member]
Deferred Stock Units [Member]
Sep. 30, 2013
Chief Operating Officer [Member]
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                 583,021                 223,176          
Number of shares, Granted                 246,621                 200,685          
Number of shares, Forfeited                 (537)                            
Number of shares, Vested                 (270,440)                            
Number of Units, Additional units from dividends                                   8,849          
Number of shares, Ending Balance             558,665   558,665   97,602   97,602     432,710   432,710          
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)                 $ 9.80                 $ 9.66          
Weighted-Average Grant Date Fair Value, Additional units from dividends, Weighted Average Grant Date Fair Value                                   $ 11.69          
Weighted-average grant date fair value, Granted (in dollars per share)                 $ 12.37                 $ 12.33          
Weighted-average grant date fair value, Forfeited (in dollars per share)                 $ 9.32                            
Weighted-average grant date fair value, Vested (in dollars per share)                 $ 10.10                            
Weighted-average grant date fair value, Ending balance (in dollars per share)             $ 10.79   $ 10.79             $ 10.94   $ 10.94          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                                              
Volatility   39.20% 37.90% 33.50% 33.10%                                    
Risk-Free Rate   0.36% 0.40% 0.66% 0.80%                                    
Fair Value at Grant Date   $ 9.55 $ 10.41 $ 12.77 $ 9.88                                    
Stock Incentive Plans (Textuals) [Abstract]                                              
Stock option and Incentive plan, shares authorized           8,000,000                                  
Number of Shares Issued or Committed to Issue           3,691,587                                  
Shares of common stock issued to board of directors                                         19,671 19,671  
Aggregate value of stock issued to board of directors                                         $ 465,000    
Award vesting period                 3 years           3 years         3 years      
Awards Expected to Vest During Current Fiscal Year (in shares)             46,936   46,936                            
Awards Expected to Vest One Year from Balance Sheet (in shares)             255,828   255,828                            
Awards Expected to Vest Two Years from Balance Sheet Date (in shares)             168,929   168,929             228,763   228,763          
Awards Expected to Vest Three Years from Balance Sheet Date (in shares)             80,626   80,626             203,947   203,947          
Awards Expected to Vest Four Years from Balance Sheet Date (in shares)             6,346,000   6,346,000                            
Unrecognized compensation cost (in dollars)             4,000,000   4,000,000   100,000   100,000     3,000,000   3,000,000          
Unrecognized compensation expense related to compensation awards, period for recognition (in months)                 24 months       5 months         25 months          
Compensation expense (in dollars)             1,000,000 700,000 2,400,000 2,700,000 100,000 100,000 200,000 700,000   400,000 200,000 1,000,000 400,000        
Compensation Expense Related to Accelerated Vesting of Awards in Connection with Retirement                                             $ 700,000
Performance period 3 years                                            
Maximum Possible Payout to Executive Officer as a Percentage of the Target Award (as a percent) 150.00%