Business Segments - Business Segment Net Sales and (Loss) Income before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue from External Customer [Line Items]
Net sales	$ 65,409	$ 64,433	$ 198,270	$ 203,995
(Loss) Income before income taxes	(376)	20,212	2,449	23,210
Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	65,409	64,433	198,270	203,995
(Loss) Income before income taxes	1,904	23,077	9,615	32,039
Operating Segments [Member] | Forged and Cast Rolls [Member]
Revenue from External Customer [Line Items]
Net sales	42,321	41,800	127,353	132,299
(Loss) Income before income taxes	(110)	4,996	2,792	9,670
Operating Segments [Member] | Air and Liquid Processing [Member]
Revenue from External Customer [Line Items]
Net sales	23,088	22,633	70,917	71,696
(Loss) Income before income taxes	2,014	18,081	6,823	22,369
Other Expense, Including Corporate Costs - Net [Member]
Revenue from External Customer [Line Items]
(Loss) Income before income taxes	$ (2,280)	$ (2,865)	$ (7,166)	$ (8,829)