Goodwill (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2013 and 2012 are as follows:

	As of December 31,
	2013		2012
Balance as of beginning of period	$	93,792	$	92,519
Goodwill acquired during the period		—		1,267
Goodwill adjustment during the period		80		—
Effect of exchange rate changes		299		6
Balance as of end of period	$	94,171	$	93,792