Fair Value Measurement Fair Value Liabilities Measured on Recurring Basis, Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	[1]	Dec. 31, 2018
Fair Value Disclosures [Abstract]
CONTINGENT EARN-OUT LIABILITY	$ 17,300	$ 39,700	$ 17,300		$ 47,400
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ 0	$ 7,700

[1] December 31, 2019 balances were derived from audited consolidated financial statements.