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Stock-Based Compensation (Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2019
Sep. 30, 2019
Number ofStock Options    
Outstanding, beginning of period (in shares) 283,686 283,686
Exercised (in shares)   (56,352)
Canceled/Forfeited (in shares)   (3,000)
Outstanding, end of period (in shares)   224,334
Exercisable (in shares)   213,901
Weighted AverageExercise Price    
Outstanding, beginning of period (in USD per share) $ 20.46 $ 20.46
Exercised (in USD per share)   8.97
Canceled/Forfeited (in USD per share)   27.91
Outstanding, end of period (in USD per share)   23.25
Exercisable (in USD per share)   $ 23.01
Weighted Average Remaining Contractual Life (years)    
Outstanding 3 years 6 months 29 days 3 years 8 months 1 day
Exercisable   3 years 5 months 26 days
Aggregate Intrinsic Value (in thousands)    
Outstanding, beginning of period $ 434 $ 434
Exercised   474
Canceled/Forfeited   0
Outstanding, end of period   0
Exercisable   $ 0