For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Business Segment and Geographic Region Information - Revenue and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue and long-lived assets by geographic region
Revenue	$ 107,723	$ 69,453	$ 74,305	$ 91,477	$ 105,683	$ 95,374	$ 119,333	$ 122,185	$ 342,958	$ 442,575	$ 410,561
Long-Lived Assets	68,084				70,982				68,084	70,982	56,796
United States.
Revenue and long-lived assets by geographic region
Revenue									256,092	342,802	313,916
Long-Lived Assets	67,336				70,022				67,336	70,022	56,089
Europe
Revenue and long-lived assets by geographic region
Revenue									28,743	29,417	26,936
Asia Pacific
Revenue and long-lived assets by geographic region
Revenue									58,123	70,356	69,709
Long-Lived Assets	$ 748				$ 960				748	960	707
International \| Revenue \| Geographic concentration risk
Revenue and long-lived assets by geographic region
Revenue									$ 306,600	$ 388,300	$ 348,500
Percentage of revenue									89.40%	87.70%	84.90%