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Income Taxes - Schedule of Income Tax Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current                      
Federal                 $ 1,938 $ 1,988 $ 2,403
State                 650 198 395
Foreign                 1,461 905 1,391
Total                 4,049 3,091 4,189
Deferred                      
Federal                 (260) 24 (123)
State                 22 (64) 23
Foreign                 (186) 75 (97)
Total                 (424) 35 (197)
Total                      
Federal                 1,678 2,012 2,280
State                 672 134 418
Foreign                 1,275 980 1,294
Total income tax expense $ 1,173 $ 505 $ 631 $ 1,316 $ 466 $ 680 $ 771 $ 1,209 $ 3,625 $ 3,126 $ 3,992