Long-Term Debt (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 18,200,000
Repayments of long-term debt	9,600,000
Net borrowings (repayments) on inventory financing arrangements	(3,116,000)	4,183,000
Proceeds from Lines of Credit	11,500,000
Repayments of Lines of Credit	$ (9,400,000)
Seven Point Three Seven Five Percentage Senior Notes Due Two Thousand Nineteen Member
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%