Goodwill (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill during the six-months period ended June 30, 2019 were as follows:

Balance as of December 31, 2018	$	715,644
Goodwill resulting from business combination - Olson (1)		3,047
Goodwill resulting from business combination - We Are Vista (2)		579
Goodwill resulting from business combination - DMS Disaster Consultants (3)		(50	)
Effect of foreign currency translation		(103	)
Balance as of June 30, 2019	$	719,117

^{(1) In 2019, the Company recorded changes to goodwill representing an immaterial correction of an error for income tax balances related to acquired assets and liabilities from the business combination that occurred in 2014.  These balances were not significant to our previously reported financial position.}

^{(2) Goodwill measurement period adjustment related to the settlement of the working capital adjustment under the purchase agreement.}

^{(3) Goodwill measurement period adjustment related to the settlement of the extended purchase commitments under the purchase agreement.}