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Share-Based Payment Arrangements (Narrative) (Details) (USD $)
6 Months Ended 6 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
May 26, 2005
Long Term Incentive Plan 2005 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Minimum [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Maximum [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
First Anniversary [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Second Anniversary [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Third Anniversary [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Long Term Incentive Plan 2005 [Member]
Fourth Anniversary [Member]
Option Issued Prior to 2009 [Member]
Jun. 30, 2013
Incentive Stock Options 2009 [Member]
Long Term Incentive Plan 2005 [Member]
Jun. 30, 2013
Incentive Stock Options 2010 [Member]
Long Term Incentive Plan 2005 [Member]
Jun. 30, 2013
Incentive Stock Options 2011 [Member]
Long Term Incentive Plan 2005 [Member]
Jun. 30, 2013
Incentive Stock Options 2011 [Member]
Long Term Incentive Plan 2005 [Member]
5,000 Grant [Member]
Jun. 30, 2013
Incentive Stock Options 2011 [Member]
Long Term Incentive Plan 2005 [Member]
10,000 Grant [Member]
Jun. 30, 2013
Non Qualified Stock Options [Member]
Long Term Incentive Plan 2005 [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Minimum [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Maximum [Member]
Jul. 27, 2012
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Apr. 10, 2012
Restricted Stock Units (RSUs) [Member]
Long Term Incentive Plan 2005 [Member]
Jun. 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   1,094,165                                          
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                                             364,509
Shares reserved for future issuance   221,336                                          
Share-based payment award vesting rights       Incentive stock options granted under the 2005 LTIP prior to 2009 vest 10%, 20%, 30% and 40% on the first, second, third and fourth anniversary dates of the grant, respectively                                      
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 3 years   7 years 3 years 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 $ 600,000                                           $ 1,000,000
Compensation costs expected to be recognized during remainder of 2013 100,000                                           200,000
Compensation costs expected to be recognized during year two 200,000                                           400,000
Compensation costs expected to be recognized during year three 200,000                                           300,000
Compensation costs expected to be recognized during year four 100,000                                           100,000
Options granted, weighted average grant date fair value                                 $ 9.20 $ 9.20          
Other than options, granted                                         129,463 122,823 243,006
Other than options, forfeited                                             9,280
Allocated share-based compensation expense                                 $ 32,000 $ 32,000