Income Taxes - Earnings Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings before income taxes
Earnings before income taxes	$ 50,266	$ 58,103	$ 40,253
U.S.
Earnings before income taxes
Earnings before income taxes	15,103	30,815	9,315
Non-U.S.
Earnings before income taxes
Earnings before income taxes	$ 35,163	$ 27,288	$ 30,938

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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