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Preneed Cemetery Activities Investment Related Activities (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Investment related activities [Line Items] |  |
Realized gains from sales of available-for-sale securities | $ 52,433 | $ 14,564
Realized losses from sales of available-for-sale securities | (21,774) | (44,120)
Cemetery |  |
Investment related activities [Line Items] |  |
Deposits | 39,522 | 36,998
Withdrawals | 38,534 | 32,411
Purchases of available-for-sale securities | 398,813 | 131,851
Sales of available-for-sale securities | 384,538 | 118,581
Realized gains from sales of available-for-sale securities | 40,029 | 6,246
Realized losses from sales of available-for-sale securities | $ (14,261) | $ (22,853)

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