Debt and Other Obligations (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Debt Instrument [Line Items]
Long-term Debt	$ 139,874,000		$ 118,828,000
Long-term Debt, Current Maturities	1,420,000		1,200,000
Capital Lease Obligations, Current	194,000		207,000
Credit Facility, Maximum Borrowing Capacity	150,000,000
Debt Instrument, Maturity Date	Dec. 31, 2016
Accrued Patronage Refunds	(345,000)	(189,000)
Interest Rate Swap Agreement [Member]
Debt Instrument [Line Items]
Amount of interest rate swaps	72,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, Maximum Borrowing Capacity	30,000,000
Debt Instrument, Unused Borrowing Capacity, Amount	29,965,000
Term Loan B Facility [Member]
Debt Instrument [Line Items]
Credit Facility, Maximum Borrowing Capacity	120,000,000
Credit Facility, Amount Outstanding	119,100,000
Debt Instrument, Periodic Payment, Principal	300,000
Period of time interest rate protection must exist on term loans (in years)	2 years
Term Loan B Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Percentage of credit facility required to be covered with interest rate swaps (in hundredths)	50.00%
Incremental Term [Member]
Debt Instrument [Line Items]
Credit Facility, Maximum Borrowing Capacity	22,000,000
Credit Facility, Amount Outstanding	21,945,000
Debt Instrument, Periodic Payment, Principal	55,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Credit Facility, Amount Outstanding	$ 35,000