Long-Term Debt (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Long-term debt:
Capital leases	$ 1,900,000	$ 2,900,000
Other debt	200,000	300,000
Total	222,100,000	178,100,000
Current portion of long-term debt	1,762,000	3,120,000
Long-term portion	220,298,000	175,046,000
Revolving credit facility [Member]
Long-term debt:
Borrowings under credit facility		31,000,000
Term Loan Portion [Member]
Long-term debt:
Borrowings under credit facility		143,900,000
New Senior Secured Revolving Credit [Member] | New Credit Facility [Member]
Long-term debt:
Borrowings under credit facility	220,000,000	0
Prior Credit Facility [Member]
Long-term debt:
Borrowings under credit facility	0	174,900,000
New Credit Facility [Member]
Long-term debt:
Borrowings under credit facility	$ 220,000,000