Consolidated Statement Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities
Net earnings (loss)	$ (56,070)us-gaap_NetIncomeLoss	$ 33,051us-gaap_NetIncomeLoss	$ 1,827us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of business (pre-tax)	(17,069)us-gaap_GainLossOnSaleOfBusiness	(82,163)us-gaap_GainLossOnSaleOfBusiness	0us-gaap_GainLossOnSaleOfBusiness
Depreciation and amortization	32,789	36,789	38,593
Provision for losses on trade and installment receivables	1,775us-gaap_ProvisionForDoubtfulAccounts	3,689us-gaap_ProvisionForDoubtfulAccounts	5,179us-gaap_ProvisionForDoubtfulAccounts
Provision (benefit) for deferred income taxes	(2,387)us-gaap_DeferredIncomeTaxExpenseBenefit	2,017us-gaap_DeferredIncomeTaxExpenseBenefit	4,316us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for other deferred liabilities	1,393us-gaap_OtherNoncashExpense	(146)us-gaap_OtherNoncashExpense	1,139us-gaap_OtherNoncashExpense
Provision for stock-based compensation	5,626us-gaap_ShareBasedCompensation	5,957us-gaap_ShareBasedCompensation	6,545us-gaap_ShareBasedCompensation
Loss on disposals of property and equipment	1,074	666	201
Loss on debt extinguishment including debt finance charges and associated fees	0	0	312
Asset write-downs to intangible assets	13,041us-gaap_AssetImpairmentCharges	1,523us-gaap_AssetImpairmentCharges	773us-gaap_AssetImpairmentCharges
Asset write-downs related to restructuring activities	1,163	0	2,892
Amortization of convertible debt discount	710	633	577
Changes in operating assets and liabilities:
Trade receivables	17,211	9,706	(214)
Installment sales contracts, net	15	(3,773)	4,521
Inventories	(9,527)us-gaap_IncreaseDecreaseInInventories	23,797us-gaap_IncreaseDecreaseInInventories	(16,620)us-gaap_IncreaseDecreaseInInventories
Other current assets	1,950	(2,070)	(6,086)
Accounts payable	8,329	(19,013)	2,560
Accrued expenses	34,113	1,396	8,549
Other long-term liabilities	(25,244)	(2,005)	7,227
Net Cash Provided by Operating Activities	8,892	10,054	62,291
Investing Activities
Purchases of property and equipment	(12,327)	(14,158)	(20,091)
Proceeds from sale of property and equipment	2,521	885	159
Proceeds from sale of businesses	21,870	187,552	0
Business acquisitions, net of cash acquired	0	0	(9,000)
Decrease (increase) in other long-term assets	20,949	1,001	(265)
Other	569	65	(245)
Net Cash Provided (Used) for Investing Activities	33,582	175,345	(29,442)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	255,658	352,455	339,314
Payments on revolving lines of credit and long-term borrowings	(286,712)us-gaap_RepaymentsOfLongTermDebt	(545,874)us-gaap_RepaymentsOfLongTermDebt	(367,500)us-gaap_RepaymentsOfLongTermDebt
Proceeds from exercise of equity awards	480	512	0
Payment of financing costs	0us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts	(1)us-gaap_PaymentsOfFinancingCosts
Payment of dividends	(1,584)us-gaap_PaymentsOfDividendsCommonStock	(1,581)us-gaap_PaymentsOfDividendsCommonStock	(1,581)us-gaap_PaymentsOfDividendsCommonStock
Net Cash Used by Financing Activities	(32,158)	(194,488)	(29,768)
Effect of exchange rate changes on cash	(1,170)	83	786
Increase (decrease) in cash and cash equivalents	9,146	(9,006)	3,867
Cash and cash equivalents at beginning of year	29,785	38,791	34,924
Cash and cash equivalents at end of year	$ 38,931	$ 29,785	$ 38,791

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Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

+ Details

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ 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 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: 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

+ Details

Name:	us-gaap_ProceedsFromStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

+ Details

Name:	us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

+ Details

Name:	us-gaap_RestructuringCostsAndAssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration