Fair Values (Details of Book Value and Fair Value of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 20,618	$ 38,931
Other investments	196	249
Installment receivables, net of reserves	2,117	1,911
Long-term debt (including current maturities of long-term debt)	(22,909)	(20,344)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	20,618	38,931
Other investments	196	249
Installment receivables, net of reserves	2,117	1,911
Long-term debt (including current maturities of long-term debt)	(23,679)	(20,261)
Other Current Assets \| Foreign currency forward contracts \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	4,744	520
Other Current Assets \| Foreign currency forward contracts \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	4,744	520
Accrued Expenses \| Foreign currency forward contracts \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(4,808)	(2,526)
Accrued Expenses \| Foreign currency forward contracts \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ (4,808)	$ (2,526)

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Fair value portion of investments accounted under the cost method.

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-SubTopic 20

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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-Subparagraph (a)

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-Paragraph 3

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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