Accrued Liabilities - Other - Accrued Liabilities - Other (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Environmental	$ 7,074,000	$ 9,475,000
Warranty	1,076,000	1,176,000
Taxes (other than income) and insurance	927,000	879,000
Commissions	482,000	551,000
Foreign currency forward contracts	761,000	673,000
Other professional fees	754,000	496,000
Accrued customer incentive plans	402,000	414,000
Deferred compensation - current	265,000	265,000
Litigation and legal fees	135,000	91,000
Acquisition earn-out, current		32,000
Deferred revenue	38,000	44,000
Other	4,589,000	2,370,000
Accrued liabilities - other	$ 16,503,000	$ 16,466,000