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Share-Based Payment Arrangements (Narrative) (Details) (USD $)
9 Months Ended 12 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
May 26, 2005
Long Term Incentive Plan 2005 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
Minimum [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
Maximum [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
First Anniversary [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
Second Anniversary [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
Third Anniversary [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Long Term Incentive Plan 2005 [Member]
Fourth Anniversary [Member]
Option Issued Prior to 2009 [Member]
Sep. 30, 2013
Incentive Stock Options 2010 [Member]
Long Term Incentive Plan 2005 [Member]
Sep. 30, 2013
Incentive Stock Options 2011 [Member]
5,000 Grant [Member]
Sep. 30, 2013
Incentive Stock Options 2011 [Member]
Long Term Incentive Plan 2005 [Member]
5,000 Grant [Member]
Sep. 30, 2013
Incentive Stock Options 2011 [Member]
Long Term Incentive Plan 2005 [Member]
10,000 Grant [Member]
Sep. 30, 2013
Non Qualified Stock Options [Member]
Long Term Incentive Plan 2005 [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Minimum [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Maximum [Member]
May 30, 2013
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Apr. 10, 2013
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Jul. 27, 2012
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                              
Stock compensation plan, number of shares authorized       2,000,000                                      
Number of incentive stock options to purchase shares of common stock outstanding     1,087,618                                        
Number of non-qualified stock options to purchase shares of common stock outstanding     304,157                       200,000                
Number of restricted stock units to receive shares of common stock                                             355,277
Shares reserved for future issuance     237,115                                        
Share-based payment award vesting rights                     3 years     3 years 7 years                
Percentage of restricted stock units granted as result of meeting growth rates                                   50.00% 150.00%        
Number of options vested or expected to vest                     25,000 5,000   10,000                  
Share-based payment, award vesting period     6 months                   7 years                    
Incentive stock options termination period     10 years   5 years 10 years         10 years   10 years 10 years 10 years                
Percentage of options vested or expected to vest     100.00%       10.00% 20.00% 30.00% 40.00%                          
Total unrecognized compensation cost related to non-vested share-based compensation arrangements $ 500,000                             $ 600,000 $ 600,000            
Compensation costs expected to be recognized during remainder of 2013 52,000                                           67,000
Compensation costs expected to be recognized during year two 200,000                                           300,000
Compensation costs expected to be recognized during year three 200,000                                           200,000
Compensation costs expected to be recognized during year four 54,000                                           53,000
Compensation costs expected to be recognized during year five 3,000                                            
Stock Options, Granted    0                                          
Options granted, weighted average grant date fair value                               $ 9.20 $ 9.20            
Other than options, granted                                         122,823 129,463 243,006
Other than options, forfeited                                       9,280     6,155
Allocated share-based compensation expense                               $ 58,000 $ 90,000