Income Taxes - Difference Between Statutory U.S. Federal Income Tax and the Corporation"s Effective Income Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Computed at statutory rate	$ 9,513	$ 5,309	$ 12,154
Tax differential on non-U.S. earnings	(223)	(45)	(358)
State income taxes	152	403	1,296
Manufacturers deduction (I.R.C. Section 199)	(566)	(257)	(792)
Meals and entertainment	205	198	220
Tax credits	(145)	(64)	(29)
Chinese joint venture	(3,125)	(558)	(175)
Reversal of valuation allowance	(156)	(132)	(178)
Other - net	158	364	778
Total provision (benefit) for taxes on income	$ 5,813	$ 5,218	$ 12,916