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Financial Instruments	9 Months Ended
Financial Instruments	Sep. 30, 2011
Financial instruments reported at fair value [Abstract]
Financial Instruments	6. Financial Instruments Financial instruments on the consolidated balance sheets that approximate fair value include: cash and cash equivalents, receivables, investments carried at fair value, payables, accrued liabilities, and long-term debt. Due to the relatively short time frame to maturity of the Company's fixed rate debt, fair value approximates its carrying value. The Company measures its interest rate swap at fair value based on information provided by the counterparty and recognizes it as a liability on the Company's condensed consolidated balance sheet. Changes in the fair value of the swap are recognized in interest expense, as the Company did not designate the swap agreement as a cash flow hedge for accounting purposes.