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Cemetery Perpetual Care Trusts Long-term Receivable and Investment (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Long-term receivable and investment components [Line Items]      
Cemetery perpetual care trust investments $ 1,050,081 $ 1,016,506  
Cemetery Perpetual Care [Member]
     
Long-term receivable and investment components [Line Items]      
Trust investments, at market 999,259 952,573 952,573
Restricted Cash and Cash Equivalents 50,822 63,933  
Cemetery perpetual care trust investments $ 1,050,081 $ 1,016,506