Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018 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	March 31, 2019			December 31, 2018
Deferred compensation plan assets	1	$	95,983		$	84,435
Corporate and municipal bonds	1	$	59,687		$	56,556
Deferred compensation plan liabilities	1	$	(95,983	)	$	(84,435	)
Interest rate swaps	2	$	533		$	1,096
Contingent purchase price liabilities	3	$	(37,548	)	$	(39,708	)

Change in Level 3 Fair Values of Contingent Purchase Price Liabilities

During the three months ended March 31, 2019 and 2018, 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 three months ended March 31, 2019 and 2018 (pre-tax basis) (in thousands):

	2019			2018
Beginning balance – January 1	$	(39,708	)	$	(37,574	)
Additions from business acquisitions		(1,806	)		(8,320	)
Settlement of contingent purchase price liabilities		3,685			2,879
Change in fair value of contingencies		502			(1,370	)
Change in net present value of contingencies		(221	)		(239	)
Ending balance – March 31	$	(37,548	)	$	(44,624	)