Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Amounts of assets under capitalized lease agreements are included in property and equipment and other long-term assets and the related obligations are included in debt
Property and equipment	$ 3,761	$ 1,814
Other long-term assets	130	130
Accumulated depreciation	(1,411)	(1,214)
Net assets under capital leases	2,480	730
Current lease obligations	755	178
Long-term lease obligations	1,644	306
Capital lease obligations	$ 2,399	$ 484