Quarterly report pursuant to Section 13 or 15(d)

Impairment of Long-Lived Assets - Additional Information (Detail)

v3.19.3
Impairment of Long-Lived Assets - Additional Information (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
Impairment Or Disposal Of Tangible Assets Disclosure [Abstract]    
Estimated aggregate fair value of long-lived assets impaired during current period $ 27,383  
Multiple of cash flows used to estimate fair value of long-lived asset 6.5 6.5