Fair Value Measurements - (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at December 31, 2019 and December 31, 2018: 

	Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2019
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	81,108	$	—	$	81,108	$	—
Asset-backed securities		10,779		—		10,779		—
Certificates of deposit		30,507		—		30,507		—
Commercial paper		30,708		—		30,708		—
Corporate bonds		36,461		—		36,461		—
Foreign currency forward contracts		120		—		120		—
Total assets	$	189,683	$	—	$	189,683	$	—
Liabilities:
Contingent consideration - acquisitions	$	569	$	—	$	—	$	569
Total liabilities	$	569	$	—	$	—	$	569
December 31, 2018
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	62,684	$	—	$	62,684	$	—
Total assets	$	62,684	$	—	$	62,684	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Foreign currency forward contracts		32		—		32		—
Total liabilities	$	2,092	$	—	$	32	$	2,060

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

This table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2019:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2018	$	2,060
Total loss due to remeasurement included in general and    administrative expense		267
Additions		—
Payments		(1,758	)
Transfer into (out of) Level 3		—
Balance at December 31, 2019	$	569