The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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+ Details

Impairment of Long-Lived Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Impairment of Long-Lived Assets (Additional Textual) [Abstract]
Impairment charges	$ 50	$ 1,164	$ 1,536	$ 1,325
Estimated aggregate fair value of long-lived assets impaired	$ 870		$ 5,677
Minimum [Member]
Impairment of Long-Lived Assets (Textual) [Abstract]
Projected future attendance fluctuations			(10.00%)
Risk-adjusted rate of return			10.00%
Maximum [Member]
Impairment of Long-Lived Assets (Textual) [Abstract]
Projected future attendance fluctuations			10.00%
Risk-adjusted rate of return			15.00%