Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Summary of Assets and (Liabilities) Measured at Fair Value on a Recurring Basis

The following table summarizes our assets and (liabilities) at June 30, 2020 and December 31, 2019, respectively, that are measured at fair value on a recurring basis subsequent to initial recognition and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value (in thousands):

	Level	June 30, 2020			December 31, 2019
Deferred compensation plan assets	1	$	107,709		$	106,851
Available-for-sale debt securities	1		38,229			60,659
Deferred compensation plan liabilities	1		(107,709	)		(106,851	)
Interest rate swaps	2		(2,729	)		(525	)
Contingent purchase price liabilities	3		(27,461	)		(32,089	)

Change in Level 3 Fair Values of Contingent Purchase Price Liabilities

During the six months ended June 30, 2020 and 2019, there were no transfers between the valuation hierarchy Levels 1, 2 and 3. The following table summarizes the change in Level 3 fair values of our contingent purchase price liabilities for the six months ended June 30, 2020 and 2019 (pre-tax basis) (in thousands):

	2020			2019
Beginning balance – January 1	$	(32,089	)	$	(39,708	)
Additions from business acquisitions		(3,385	)		(1,806	)
Settlement of contingent purchase price liabilities		7,859			13,316
Change in fair value of contingencies		497			561
Change in net present value of contingencies		(343	)		(368	)
Ending balance – June 30	$	(27,461	)	$	(28,005	)