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: | |||
Balance at Beginning of Period | $ 2,616 | $ 3,527 | $ 2,310 |
Additions Charged to Costs and Expenses | 4,391 | 2,452 | 4,632 |
Write-offs | (3,383) | (4,037) | (3,935) |
Recoveries | 817 | 674 | 520 |
Balance at End of Period | $ 4,441 | $ 2,616 | $ 3,527 |