v3.19.1
Stock-Based Compensation - Restricted Stock Summary (Details) - Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested at beginning of year (in shares) 42,000 52,000
Add: Granted (in shares) 12,000 10,000
Less: Vested (in shares) (16,000) (16,000)
Less: Forfeited (in shares) 0 (4,000)
Nonvested at end of year (in shares) 38,000 42,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Nonvested at beginning of year (in dollars per share) $ 8.66 $ 7.45
Add: Granted (in dollars per share) 12.38 12.38
Less: Vested (in dollars per share) 7.50 7.50
Less: Forfeited (in dollars per share) 0.00 6.88
Nonvested at end of year (in dollars per share) $ 10.32 $ 8.66