Annual report pursuant to Section 13 and 15(d)

Income Taxes - Provision (Benefit) for Income Taxes - (Details)

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Income Taxes - Provision (Benefit) for Income Taxes - (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current:      
Federal $ 2,253 $ 2,515 $ 2,779
State 552 55 61
Foreign 408 357 231
Total current income tax 3,213 2,927 3,071
Deferred:      
Federal 273 102 (40)
State 5 3 (3)
Total deferred income tax 278 105 (43)
Income tax expense $ 3,491 $ 3,032 $ 3,028
Effective tax rate (as a percent) 40.80% 33.90% 34.20%