Fair Values of Financial Instruments Details of Book Value and Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified																													12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Cash and Cash Equivalents [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Cash and Cash Equivalents [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Cash and Cash Equivalents [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Cash and Cash Equivalents [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Other Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Other Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Other Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Other Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Accounts and Notes Receivable, Net [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Accounts and Notes Receivable, Net [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Accounts and Notes Receivable, Net [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Accounts and Notes Receivable, Net [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Debt [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Debt [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Debt [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Debt [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Foreign Exchange Forward [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Foreign Exchange Forward [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 NA/HME [Member]	Dec. 31, 2011 NA/HME [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discounted Cash Flow, Discount Rate Premium																													2.00%	2.30%
Cash and Cash Equivalents, at Carrying Value	$ 38,791	$ 34,924	$ 48,462	$ 37,501	$ 38,791	$ 34,924
Cash and Cash Equivalents							38,791	34,924
Other Investments									1,171	1,362	1,171	1,362
Installment receivables, net	2,188	6,671											2,594	7,477	2,594	7,477
Long-term debt (including current maturities of long-term debt)																	(234,802)	(265,484)	(234,072)	(264,112)
Other current assets	41,776	38,831																			1,062	1,685	1,062	1,685	0	18	0	18
Accrued Expenses																					$ (1,057)	$ (505)	$ (1,057)	$ (505)	$ (316)	$ (388)	$ (316)	$ (388)