Goodwill and Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 1,258	$ 879
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 1,300