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Preneed Activities Investment Related Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Investment related activities [Line Items] |  |  |  |
Document Period End Date |  |  | Sep. 30, 2018 |
Deposits | $ 96,539 | $ 86,028 | $ 296,651 | $ 277,286
Withdrawals | 97,525 | 99,872 | 318,818 | 297,595
Purchases of available-for-sale securities | 265,125 | 886,732 | 1,273,683 | 1,792,190
Sales of available-for-sale securities | 295,983 | 509,675 | 1,331,981 | 1,742,860
Realized gains on investments | 70,095 | 79,971 | 216,241 | 185,897
Realized losses on investments | (20,358) | (17,707) | (50,210) | (62,657)
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Investment related activities [Line Items] |  |  |  |
Proceeds from Sale of Other Investments | $ 9 | $ 854 | $ 9 | $ 931

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