CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITES
Net income	$ 22,512	$ 32,509
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	11,176	10,832
Amortization expense (including deferred financing fees)	1,064	1,257
Loss (gain) on disposal of property, plant, and equipment	126	(483)
Write-off of deferred financing fees	0	477
Unrealized foreign currency (gains) losses	(2,177)	1,997
Stock-based compensation	8,011	7,841
Other non-cash items	22	22
Changes in assets and liabilities net of effects of acquisitions:
Customer receivables	15,259	26,247
Inventories	3,878	(11,375)
Accounts payable	(9,646)	(10,317)
Current and deferred income taxes	(2,241)	(12,327)
Prepaid and other current assets	532	(3,694)
Other current liabilities	(16,570)	(11,615)
Other noncurrent assets and liabilities	(597)	(2,316)
Cash provided by operating activities	31,349	29,055
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, net	(20,486)	(10,088)
Purchase of business, net of cash acquired	0	(5,968)
Purchase of intangibles	(275)	(488)
Cash used in investing activities	(20,761)	(16,544)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from revolving credit facility	206,000	491,000
Repayment of revolving credit facility	(216,000)	(500,000)
Payment of financing fees	(13)	(2,846)
Payment of dividends	(16,888)	(14,925)
Proceeds from the issuance of common stock	2,234	886
Purchase of common stock for treasury	(2,729)	(3,465)
Tax benefit from the exercise of stock options and vesting of equity awards	246	126
Cash used in financing activities	(27,150)	(29,224)
Effect of exchange rate changes on cash and cash equivalents	119	(860)
Decrease in cash and cash equivalents	(16,443)	(17,573)
Cash and cash equivalents at beginning of period	29,956	28,263
Cash and cash equivalents at end of period	$ 13,513	$ 10,690