Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Compensation - Summary of Restricted Stock Activity (Detail)

v3.10.0.1
Stock Compensation - Summary of Restricted Stock Activity (Detail) - Restricted Stock - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Number of shares, outstanding (in shares) 327,211 137,244 126,995
Number of shares, granted 87,811 372,711 43,332
Number of shares, vested (in shares) (119,180) (182,744) (33,083)
Number of shares, forfeited (in shares) (13,334) 0 0
Number of shares, outstanding (in shares) 282,508 327,211 137,244
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted average grant date fair value, nonvested (in dollars per share) $ 7.27 $ 3.59 $ 3.10
Weighted average grant date fair value, granted (in dollars per share) 12.87 7.27 8.49
Weighted average grant date fair value, vested (in dollars per share) 7.27 4.50 8.13
Weighted average grant date fair value, forfeited (in dollars per share) 7.27 0 0
Weighted average grant date fair value, nonvested (in dollars per share) $ 9.01 $ 7.27 $ 3.59
Stock compensation expense $ 1.3 $ 1.3 $ 0.5