Restructuring Costs - Schedule of Restructuring Costs (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Charged to Earnings	$ 223,000	$ 223,000	$ 463,000
Restructuring Plan 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Charged to Earnings		223,000
Cash Payments		186,000
Accrual ending balance	$ 37,000	$ 37,000