Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net (loss) income	$ (81,824)us-gaap_NetIncomeLoss	$ (5,633)us-gaap_NetIncomeLoss	$ 12,645us-gaap_NetIncomeLoss
Loss from discontinued operations	(32)	(4)	(5)
(Loss) income from continuing operations	(81,792)	(5,629)	12,650
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	25,432	27,050	26,344
Intangible asset impairment	107,970	23,160	4,628
Loss on early note redemption	0	7,166	0
Stock compensation expense	3,150us-gaap_ShareBasedCompensation	2,564us-gaap_ShareBasedCompensation	3,148us-gaap_ShareBasedCompensation
Non-cash charges to interest expense	1,012	1,006	1,547
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Other non-cash adjustments	(1,362)us-gaap_OtherNoncashIncomeExpense	3,800us-gaap_OtherNoncashIncomeExpense	4,176us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities (excluding the effects of acquisitions):
Accounts receivable	(14,323)	(1,020)	6,268
Inventories	(8,599)us-gaap_IncreaseDecreaseInInventories	(4,971)us-gaap_IncreaseDecreaseInInventories	(1,022)us-gaap_IncreaseDecreaseInInventories
Other current assets and other assets	(2,456)	(398)	2,409
Accounts payable	11,205	417	(3,770)
Accrued expenses and other non-current liabilities	(1,014)	8,396	(7,140)
Net cash provided by operating activities of continuing operations	32,583	60,304	50,232
Net cash used in operating activities of discontinued operations	(41)	(9)	(151)
Net cash provided by operating activities	32,542	60,295	50,081
Cash Flows from Investing Activities
Purchases of property, plant, and equipment	(23,291)	(14,940)	(11,351)
Cash paid for acquisitions, net of cash acquired	0	(5,536)	(45,071)
Proceeds from other investment	277	0	0
Net proceeds from sale of property and equipment	5,992	12,610	659
Net cash used in investing activities	(17,022)	(7,866)	(55,763)
Cash Flows from Financing Activities
Long-term debt payments	(407)us-gaap_RepaymentsOfLongTermDebt	(205,094)us-gaap_RepaymentsOfLongTermDebt	(473)us-gaap_RepaymentsOfLongTermDebt
Proceeds from long-term debt	0	210,000	0
Payment of note redemption fees	0	(3,702)	0
Payment of deferred financing fees	(35)us-gaap_PaymentsOfFinancingCosts	(3,899)us-gaap_PaymentsOfFinancingCosts	(18)us-gaap_PaymentsOfFinancingCosts
Purchase of treasury stock at market prices	(575)	(714)	(970)
Excess tax benefit from stock compensation	100	72	10
Net proceeds from issuance of common stock	595	648	278
Net cash used in financing activities	(322)	(2,689)	(1,173)
Effect of exchange rate changes on cash	(1,627)	(729)	766
Net increase (decrease) in cash and cash equivalents	13,571	49,011	(6,089)
Cash and cash equivalents at beginning of year	97,039	48,028	54,117
Cash and cash equivalents at end of year	$ 110,610	$ 97,039	$ 48,028

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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