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Share-Based Payments (Details)
 12 Months Ended 12 Months Ended 6 Months Ended 24 Months Ended 30 Months Ended
Dec. 31, 2013
plan
Dec. 31, 2012
Dec. 31, 2013
Employee Stock
Dec. 31, 2013
Director and Officer
Dec. 31, 2013
Employee
Jun. 30, 2005
Incentive Plan, 1998
Jun. 30, 2003
Incentive Plan, 1998
Dec. 31, 1999
Incentive Plan, 1998
Jun. 30, 2002
Incentive Plan, 1998
Dec. 31, 2013
Incentive Plan, 1998
Dec. 31, 2013
Equity Incentive Plan, 2007
Share-based Compensation Arrangement by Share-based Payment Award                      
Number of share-based compensation plans 2                    
Options, grants in period, gross 127,500             1,066,000 1,248,250    
Share-based payment award, award vesting period       3 years 4 years     9 years 9 months 18 days 6 years    
Share-based payment award, accelerated vesting, number           300,494 637,089        
Share-based payment award, number of shares authorized                   2,500,000 1,000,000
Share-based payment award, expiration period 10 years                    
Share-based payment award, options, outstanding, number 1,111,274 1,137,283               550,000 561,274
Number of options authorized and unissued                   0 259,154
Share-based payment award, maximum employee subscription rate     10.00%                
Number of shares contributed by employer per share of employee contributed shares     9