Long-Term Debt, Capital Lease Obligations and Hedging Arrangements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Property and equipment, net	$ 145,673	$ 148,298
Total long-term obligations	89,209	89,785
Less amounts due within one year	(967)	(1,017)
Long-term obligations, net of current portion	88,242	88,768
Mortgage note payable [Member]
Debt Instrument [Line Items]
Interest rate	8.50%
Long-term debt, gross	1,695	2,076
Term loans [Member]
Debt Instrument [Line Items]
Long-term debt, gross	87,328	87,389
Capital leases [Member]
Debt Instrument [Line Items]
Long-term debt, gross	186	320
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving loans	0	0
Assets Used As Collateral [Member] | Mortgage note payable [Member]
Debt Instrument [Line Items]
Property and equipment, net		$ 1,700