XML 54 R44.htm IDEA: XBRL DOCUMENT v3.19.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Income Tax Disclosure [Abstract]    
Income tax expense $ 2,393 $ 2,697
Tax benefit $ 100 $ 100