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Stockholders' Equity (Narrative) (Details) (USD $)
 0 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended
May 21, 2014
director
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Mar. 05, 2012
Director Compensation Policy [Member]
Jun. 30, 2014
ESPP
Jun. 30, 2013
ESPP
Jun. 30, 2014
ESPP
Jun. 30, 2013
ESPP
Jun. 30, 2014
Restricted Stock
Jun. 30, 2013
Restricted Stock
Jun. 30, 2014
Restricted Stock
Jun. 30, 2013
Restricted Stock
Jun. 30, 2014
Restricted Stock
Minimum [Member]
Jun. 30, 2014
Restricted Stock
Maximum [Member]
May 21, 2014
Stock Options
May 22, 2014
Stock Options
Jun. 30, 2014
Stock Options
Jun. 30, 2013
Stock Options
Jun. 30, 2014
Stock Options
Jun. 30, 2013
Stock Options
Jun. 30, 2014
Performance Shares
Mar. 03, 2014
Common Stock
Jun. 30, 2014
Common Stock
Jun. 30, 2014
Common Stock
May 21, 2014
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                      
Share based compensation awards, options outstanding at period end (in Shares)                                     1,429,421   1,429,421            
Share based compensation awards, options outstanding and unvested at period end (in Shares)                                     1,097,022   1,097,022            
Shares purchased through Employee Stock Purchase Plan (in Shares)             14,507                                        
Weighted average purchase price of ESPP shares purchased during the period (in Dollars per share)             $ 14.56                                        
Share-based compensation expense             $ 73,000 $ 88,000 $ 189,000 $ 187,000 $ 496,000 $ 300,000 $ 841,000 $ 700,000         $ 470,000 $ 131,000 $ 734,000 $ 178,000          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                         4 years   3 years 5 years         4 years            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period                                         6 years            
Stock Granted, Value, Share-based Compensation, Net of Forfeitures                                         100,000            
Share based compensation awards, vesting percentage per period (in Percent)                         25.00%   20.00% 33.33%         25.00%            
Unrecognized share based compensation                     5,700,000   5,700,000                            
Unrecognized share based compensation, expected term (in Duration)       2 years 7 months 6 days                                              
Performance award hurdle price (in Dollars per share)                                             $ 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        
Payment for Non-cash Exercise of Share-based Awards, Base Rate Per Share                                             $ 19.00        
Payments for Non-cash Exercise of Share-based Awards                                             16,100,000        
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 During Period, Shares, Share-based Compensation, Gross                                                     13,233
Number of Directors 3                                                    
Directors compensation expense   326,000 476,000 648,000 609,000                                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                                 6,000 25,000                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price                                 $ 17.00 $ 17.21                  
Common Stock, Dividends, Per Share, Declared   $ 0.025 $ 0.025 $ 0.050 $ 0.050                                     $ 0.025      
Dividends, Common Stock, Cash                                                 $ 500,000 $ 900,000