Goodwill and Intangibles - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 787,000	$ 546,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 788,000