Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net income	$ 7,883	$ 9,985
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	8,150	7,545
Amortization of intangible assets	1,001	757
Non-cash stock compensation	438	667
Provision for (recovery of) loss on accounts receivable	822	(627)
Deferred taxes	2,227	(32)
Other long-term liabilities	(834)	586
Gain on sale of property, plant and equipment	0	(224)
Other	0	50
Cash flow used for working capital:
Accounts receivable	(9,833)	(7,679)
Inventories	(2,224)	(7,089)
Prepaid expenses	(237)	(1,726)
Accounts payable and accrued expenses	(13,896)	(8,623)
Net cash used in operating activities	(6,503)	(6,410)
Cash Flows from Investing Activities
Additions to property, plant and equipment	(4,508)	(3,138)
Proceeds from sale of property, plant and equipment	0	1,332
Other	96	(3)
Net cash used in investing activities	(4,412)	(1,809)
Cash Flows from Financing Activities
Repayment of long-term debt	0	(305)
Net borrowing on credit facility	10,763	6,262
Cash dividends paid	0	(2,316)
Proceeds from issuance of common stock	1,706	397
Tax benefit from options	37	0
Repurchase of common stock	(1,955)	0
Net cash provided by financing activities	10,551	4,038
Foreign exchange rate effect on cash	469	676
Net increase (decrease) in cash	105	(3,505)
Cash at January 1	3,948	6,801
Cash at March 31	$ 4,053	$ 3,296