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Fair Value Measurements (Policies)
6 Months Ended
Jun. 30, 2012
Fair Value Disclosures [Abstract]  
Impairment or disposal of long-lived assets, policy
The Company periodically evaluates long-lived assets held for use whenever events or changes in circumstances indicate that the carrying amount of those assets may not be recoverable. The Company analyzes historical and expected future cash flows of operating locations as well as lease terms, condition of the assets and related need for repairs and maintenance. Impairment loss is recognized to the extent that the fair value of the assets is less than the carrying value.