Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 16,791	$ 14,253
Adjustments to reconcile net income to net cash provided by operating activities
Deferred income taxes	(1,000)	7
Depreciation and amortization	9,075	6,640
Equity in (income)/losses of nonconsolidated investment	(570)	272
Loss on sale of property, plant and equipment	95	1
Deferred gain amortization on sale-leaseback	(738)	(161)
Stock-based compensation	1,720	1,199
Excess tax benefit from share-based compensation	(389)	(623)
Unrealized loss on derivative mark-to-market		11
Change in operating assets and liabilities:
Accounts receivable	(11,959)	(1,209)
Inventories	(3,940)	5,212
Other current assets	554	75
Prepaid income tax	1,669	160
Other noncurrent assets	(432)	85
Accounts payable - trade	8,260	(9,228)
Deferred revenue	(9,149)	16,247
Accrued payroll and employee benefits	(740)	177
Other current liabilities	1,624	(384)
Other liabilities	(840)	(79)
Net Cash Provided by Operating Activities	10,031	32,655
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of property, plant and equipment	51
Capital expenditures on property, plant and equipment	(8,107)	(4,064)
Acquisitions	(8,952)	(5,050)
Capital contributions to equity method investment	(625)	(800)
Net Cash Used by Investing Activities	(17,633)	(9,914)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt, term loan		(2,143)
Repayments of other long-term debt	(2,017)	(2,155)
Proceeds from exercise of stock options and stock awards	123	272
Excess tax benefit from share-based compensation	389	623
Treasury stock acquisitions	(6,501)
Cash dividends on common stock paid to shareholders	(767)
Net Cash Used by Financing Activities	(8,773)	(3,403)
Effect of exchange rate changes on cash and cash equivalents	(1,290)
Net (Decrease) / Increase in Cash and Cash Equivalents	(17,665)	19,338
Cash and Cash Equivalents at Beginning of Period	74,800	124,845
Cash and Cash Equivalents at End of Period	57,135	144,183
Supplemental Disclosure of Cash Flow Information:
Interest Paid	360	605
Income Taxes Paid	6,314	7,766
Capital Expenditures Funded through Capital Leases		$ 144