Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (12,451)	$ 50,030	$ 18,590
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	20,583	14,067	12,576
Provision for doubtful accounts	2,520	2,599	4,324
Noncash amortization of debt financing costs	1,132	1,132	1,254
Loss on early extinguishment of debt			7,448
Amortization of bond discount/premium, net			(345)
Pension plan contributions	(3,103)	(2,649)	(2,860)
Shared-based compensation expense	5,278	4,710	3,621
Loss on sale of assets	142	126	326
Deferred income tax benefit	(398)	(30,762)	(1,004)
Noncash (gain) loss on forward exchange contracts	264	(765)	347
Change in other operating items:
Accounts receivable	(6,934)	15,126	(39,844)
Inventories	8,553	(6,748)	(9,962)
Prepaid expenses	(1,250)	1,559	1,295
Accounts payable and accrued liabilities	11,457	(25,273)	9,824
Income taxes payable	(1,683)	(1,243)	2,002
Pension obligation	(1,387)	1,613	513
Other operating activities, net	(3,569)	527	(311)
Net cash provided by operating activities	19,154	24,049	7,794
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(12,626)	(17,323)	(21,325)
Proceeds from disposal/sale of property, plant and equipment	322	125	63
Post-acquisition and acquisition payments, net of cash received		(24,520)	(11,114)
Other investing activities, net	(645)	(1,041)
Net cash used in investing activities	(12,949)	(42,759)	(32,376)
CASH FLOWS (USED IN) PROVIDED BY FINANCING ACTIVITIES:
Proceeds from issuance of common stock under equity incentive plans	38	5	5
Surrender of common stock by employees	(831)	(1,205)	(1,208)
Repayment of long-term debt			(170,929)
Borrowings of long-term debt			250,000
Debt issuance costs and other	(144)	22	(6,938)
Net cash (used in) provided by financing activities	(937)	(1,178)	70,930
EFFECT OF CURRENCY EXCHANGE RATE CHANGES ON CASH	(942)	302	(984)
NET INCREASE (DECREASE) IN CASH	4,326	(19,586)	45,364
CASH:
Beginning of period	68,369	87,955	42,591
End of period	72,695	68,369	87,955
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest	19,958	19,944	20,512
Cash paid for income taxes, net	2,344	4,566	1,184
Unpaid purchases of property and equipment included in accounts payable	$ 1,040	$ 1,318	$ 966