Goodwill (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2018 and 2017 are as follows:

	As of December 31,
	2018			2017
Balance as of beginning of year	$	93,793		$	93,469
Effect of exchange rate changes		(202	)		324
Additions		96			—
Balance as of end of year	$	93,687		$	93,793