Fair Values (Details of Book Value and Fair Value of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 29,066	$ 29,785
Other investments	642	998
Installment receivables, net of reserves	2,528	2,819
Long-term debt (including current maturities of long-term debt)	(24,688)	(45,286)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	29,066	29,785
Other investments	642	998
Installment receivables, net of reserves	2,528	2,819
Long-term debt (including current maturities of long-term debt)	(23,794)	(46,124)
Other Current Assets | Foreign currency forward contracts | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,140	789
Other Current Assets | Foreign currency forward contracts | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,140	789
Accrued Expenses | Foreign currency forward contracts | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(3,609)	(1,200)
Accrued Expenses | Foreign currency forward contracts | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(3,609)	(1,200)
Accrued Expenses | Interest rate swaps | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	(12)
Accrued Expenses | Interest rate swaps | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 0	$ (12)