Goodwill and Other Intangibles - Schedule of Goodwill (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Balance at beginning of year	$ 17,281
Additions for acquisitions	742
Effects of currency exchange	(123)
Balance at end of year	$ 17,900