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Stock-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 6 Months Ended
Jan. 02, 2014
Jun. 30, 2014
Stock-Based Compensation Expense    
Stock options granted (in shares)   52,800
Options granted strike price $ 10.25 $ 10.13
Unrecognized compensation expense related to restricted stock and stock option awards   $ 4
Unrecognized compensation expense, period for recognition   2 years 1 month 6 days
Common Stock
    
Stock-Based Compensation Expense    
Maximum number of shares of common stock authorized for issuance under the incentive plan (in shares)   1,264,911
Restricted Stock
    
Stock-Based Compensation Expense    
Award agreement triggering award to fully vest on date of change in control, period prior to change in control date   6 months
Award agreement triggering award to fully vest on date of employee service termination, period following change in control date   2 years
Stock Option
    
Stock-Based Compensation Expense    
Award agreement triggering award to fully vest on date of change in control, period prior to change in control date   6 months
Award agreement triggering award to fully vest on date of employee service termination, period following change in control date   2 years
Award vesting period   4 years
Stock options awards expiration period   10 years