Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

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 December 31, 2016 and 2015 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		December 31, 2016			December 31, 2015
Deferred compensation plan assets		1	$	69,912		$	64,245
Corporate and municipal bonds		1	$	44,573		$	43,142
Interest rate swap		2	$	529		$	240
Contingent purchase price liabilities		3	$	(33,709	)	$	(24,817	)

Change in Level 3 Fair Values of Contingent Purchase Price Liabilities

For the years ended December 31, 2016 and 2015, there were no transfers between the valuation hierarchy Levels 1, 2 and 3. The following table summarizes the change in fair value of our contingent purchase price liabilities identified as Level 3 for the years ended December 31, 2016 and 2015 (pre-tax basis, in thousands):

	Contingent Purchase Price Liabilities
Beginning balance — January 1, 2015	$	(33,368	)
Additions from business acquisitions		(8,522	)
Payment of contingent purchase price payable		14,364
Change in fair value of contingency		2,854
Change in net present value of contingency		(145	)
Balance — December 31, 2015	$	(24,817	)
Additions from business acquisitions		(21,088	)
Settlement of contingent purchase price payable		11,202
Change in fair value of contingency		1,342
Change in net present value of contingency		(348	)
Balance — December 31, 2016	$	(33,709	)