Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 22,895	$ 20,492	$ 15,727
Adjustments to reconcile net income to net cash provided by operating activities
Gain on sale of marketable securities	0	(1,364)	(1,194)
Deferred income taxes	3,484	1,130	(675)
Excess tax benefit from share-based compensation	(425)	(961)	(128)
Depreciation and amortization	12,360	9,489	8,720
Loss on sale of property, plant and equipment	145	10	32
Deferred gain amortization on sale-leaseback	(1,081)	(215)	(215)
Equity in (gains)/losses of nonconsolidated investments	(708)	213	0
Stock-based compensation	1,958	1,944	653
Unrealized loss on derivative mark-to-market	0	11	22
Change in operating assets and liabilities:
Accounts receivable	992	11,397	3,135
Inventories	(2,071)	30,606	3,934
Other current assets	922	10	60
Prepaid income taxes	(2,239)	462	(120)
Other noncurrent assets	(136)	88	40
Accounts payable - trade	4,772	(13,158)	(773)
Deferred revenue	(9,609)	667	0
Accrued payroll and employee benefits	(372)	(1,396)	(1,894)
Other current liabilities	(2,161)	897	(1,379)
Other liabilities	1,944	(840)	(205)
Net Cash Provided by Operating Activities	30,670	59,482	25,740
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisitions, net of cash received	(8,952)	(90,807)	0
Proceeds from the sale of assets, property, plant and equipment	41	10,179	1
Capital expenditures on property, plant and equipment	(11,939)	(6,160)	(6,107)
Capital contributions to equity method investment	(800)	(800)	(1,400)
Proceeds from the sale of marketable securities	0	0	2,115
Net Cash Used by Investing Activities	(21,650)	(87,588)	(5,391)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of term loan	0	(13,095)	(2,857)
Repayments of other long-term debt	(2,366)	(10,288)	(6,051)
Proceeds from exercise of stock options and stock awards	207	451	65
Excess tax benefit from share-based compensation	425	961	128
Cash dividends on common stock paid to shareholders	(1,022)	0	0
Treasury stock acquisitions	(6,480)	(17)	(1,863)
Net Cash Used by Financing Activities	(9,236)	(21,988)	(10,578)
Effect of exchange rate changes on cash and cash equivalents	(857)	49	0
Net (Decrease) / Increase in Cash and Cash Equivalents	(1,073)	(50,045)	9,771
Cash and Cash Equivalents at Beginning of Period	74,800	124,845	115,074
Cash and Cash Equivalents at End of Period	73,727	74,800	124,845
Supplemental Disclosure of Cash Flow Information:
Interest Paid	505	806	1,122
Income Taxes Paid	9,395	10,805	13,381
Portec Available-for-Sale Securities Redeemed as part of Acquisition	0	2,158	0
Capital Expenditures Funded through Capital Leases	0	199	0
Accrued Portec Purchase Price Funded in January 2011	$ 0	$ 8,952	$ 0