Short-Term Borrowings (Details) (USD $)	9 Months Ended				3 Months Ended	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2012 United States Accounts Receivable Balance [Member]	Sep. 30, 2012 Foreign Accounts Receivable Balance [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Minimum [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable			80.00%	65.00%
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable past due					60 days
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable, Days from Invoice Date					120 days
Line of Credit Facility, Interest Rate at Period End	3.25%
Line of Credit Facility, Variable Interest Rate, Base Percent	0.21%
Debt Instrument, Basis Spread on Variable Rate	1.25%
Line of Credit Facility, Commitment Fee Amount	35,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.375%
Line of Credit Facility, Covenant Terms, Liquidity Ratio							1.25
Line of Credit Facility, Covenant Terms, Liquidity Ratio, Allowable Subsidiary Cash Balance						10,000,000
Line of Credit Facility, EBITDA Requirements		3,000,000
Line of Credit Facility, Covenant Terms, 2012 Capital Expenditures						20,000,000
Line of Credit Facility, Covenant Terms, 2013 and Beyond Capital Ependitures						$ 8,000,000