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Stock-Based Compensation (Narrative) (Details) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Mar. 05, 2012
Director Compensation Policy [Member]
Sep. 30, 2013
ESPP
Sep. 30, 2012
ESPP
Sep. 30, 2013
ESPP
Sep. 30, 2012
ESPP
Sep. 30, 2013
Restricted Stock [Member]
Sep. 30, 2012
Restricted Stock [Member]
Sep. 30, 2013
Restricted Stock [Member]
Sep. 30, 2012
Restricted Stock [Member]
Sep. 30, 2013
Stock Options
Sep. 30, 2012
Stock Options
Sep. 30, 2013
Stock Options
Sep. 30, 2012
Stock Options
Sep. 30, 2013
Performance Shares [Member]
Sep. 30, 2013
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                      
Share based compensation awards, options outstanding at period end (in Shares)                           778,459   778,459      
Share based compensation awards, options outstanding and unvested at period end (in Shares)                           585,985   585,985      
Shares purchased through Employee Stock Purchase Plan (in Shares)           16,277                          
Weighted average purchase price of ESPP shares purchased during the period (in Dollars per share)           $ 11.82                          
Share based compensation expense           $ 43,000 $ 29,000 $ 230,000 $ 101,000 $ 472,000 $ 349,000 $ 1,353,000 $ 953,000 $ 441,000 $ 43,000 $ 618,000 $ 170,000 $ 134,000 $ 409,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                   5 years   3 years              
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures                   500,000                  
Share based compensation awards, vesting percentage per period (in Percent)                   20.00%   33.33%              
Unrecognized share based compensation                   2,800,000   2,800,000              
Unrecognized share based compensation, expected term (in Duration)     1 year 8 months 12 days                                
Performance award hurdle price (in Dollars per share)                                   $ 21.50 $ 21.50
Number of days market price must exceed limit to vest                                     3 days
Term when market price must exceed limit to vest                                     30 days
Performance award purchase price option 1 (in Dollars per share)                                     $ 0.50
Performance award purchase price option 2 (in Dollars per share)                                     $ 9
Directors fees approved under new Directors Compensation Policy, audit committee chair         17,500                            
Directors fees approved under new Directors Compensation Policy, compensation and corporate governance chair         15,000                            
Directors fees approved under new Directors Compensation Policy, lead director         115,000                            
Directors fees approved under new Directors Compensation Policy, each independent director         40,000                            
Directors fees approved under new Directors Compensation Policy, each independent director per regular or scheduled meeting         75,000                            
Directors fees approved under new Directors Compensation Policy, other committee members and chairs         2,000                            
Directors fees approved under new Directors Compensation Policy         1,600                            
Stock issued to directors                   25,000                  
Directors compensation expense $ 81,000 $ 115,000 $ 690,000 $ 731,000