Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	May 23, 2019	May 20, 2019	Aug. 28, 2017
Class of Stock [Line Items]
Shares sold (in shares)			200,000
Public Stock Offering
Class of Stock [Line Items]
Shares sold (in shares)	6,000,000	5,000,000
Common stock, par value (in dollars per share)		$ 0.01
Over-Allotment Option
Class of Stock [Line Items]
Shares sold (in shares)	900,000	750,000