CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITES
Net income	$ 13,962	$ 20,312
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	7,571	7,307
Amortization expense (including deferred financing fees)	709	821
Loss on disposal of fixed assets	148	8
Write-off of deferred financing fees		477
Unrealized foreign currency gains	(3,818)	(56)
Stock-based compensation	5,646	5,358
Other non-cash items	15	15
Changes in assets and liabilities, net of effects of acquisitions:
Customer receivables	5,011	22,029
Inventories	3,006	(6,711)
Accounts payable	394	(17,470)
Current and deferred income taxes	(4,425)	(11,197)
Other current assets	(905)	(2,178)
Other current liabilities	(14,498)	(11,008)
Other noncurrent assets and liabilities	3,195	(1,225)
Cash provided by operating activities	16,011	6,482
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, net	(17,139)	(6,473)
Purchase of business, net of cash acquired		(5,968)
Purchase of intangibles	(275)	(175)
Cash used in investing activities	(17,414)	(12,616)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from revolving credit facility	133,000	420,000
Repayment of revolving credit facility	(138,000)	(414,000)
Payment of financing fees	(13)	(2,827)
Payment of dividends	(11,257)	(9,323)
Proceeds from the issuance of common stock	2,147	413
Purchase of common stock for treasury	(2,513)	(2,622)
Tax benefit from the exercise of stock options and vesting of equity awards	208	(705)
Cash used in financing activities	(16,428)	(9,064)
Effect of exchange rate changes on cash and cash equivalents	(1,062)	(1,592)
Decrease in cash and cash equivalents	(18,893)	(16,790)
Cash and cash equivalents at beginning of period	29,956	28,263
Cash and cash equivalents at end of period	$ 11,063	$ 11,473