Fair Value of Financial Instruments - Changes in the Estimated Fair Values of the Company’s Liabilities for Contingent Consideration Measured Using Significant Unobservable Inputs (Level 3) (Details) - Obligations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 3,340	$ 2,550
Purchases	0	3,340
Change in fair value	(3,340)	0
Settlement	0	(2,550)
Ending Balance	$ 0	$ 3,340