Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation and Qualifying Accounts (Details)

v3.19.1
Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Allowance for doubtful accounts (deducted from trade and notes receivable) $ 4,039 $ 5,359 $ 1,177
Allowance for doubtful accounts (deducted from trade and notes receivable) (928) (1,283)  
Allowance for doubtful accounts (deducted from trade and notes receivable) [1] (2,251) (37) (98)
Allowance for doubtful accounts (deducted from trade and notes receivable) $ 860 $ 4,039 5,359
Allowance for doubtful accounts (deducted from trade and notes receivable)     $ 4,280
[1] Trade receivable amounts deemed uncollectible that were removed from accounts receivable and allowance for doubtful accounts.