Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)

v3.19.2
CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Current assets    
Allowance for doubtful accounts $ 35,215 $ 34,225