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Fair Value of Financial Instruments - Financial Instrument Not Carried at Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Level 1 |  |
Investments |  |
Other investments | $ 0 | $ 0
Financial Liabilities |  |
Investment contract reserves | 0 | 0
Life policy reserves, account values on life contracts | 0 | 0
Other policyholder funds | 0 | 0
Long-term debt | 264,781 | 248,191
Level 2 |  |
Investments |  |
Other investments | 0 | 0
Financial Liabilities |  |
Investment contract reserves | 0 | 0
Life policy reserves, account values on life contracts | 0 | 0
Other policyholder funds | 575,579 | 575,253
Long-term debt | 0 | 0
Level 3 |  |
Investments |  |
Other investments | 159,253 | 156,536
Financial Liabilities |  |
Investment contract reserves | 4,338,318 | 4,280,528
Life policy reserves, account values on life contracts | 86,906 | 85,066
Other policyholder funds | 68,804 | 74,304
Long-term debt | 0 | 0
Carrying Amount |  |
Investments |  |
Other investments | 154,630 | 151,965
Financial Liabilities |  |
Investment contract reserves | 4,428,989 | 4,360,456
Life policy reserves, account values on life contracts | 81,520 | 79,591
Other policyholder funds | 644,383 | 649,557
Long-term debt | 247,403 | 247,209
Fair Value |  |
Investments |  |
Other investments | 159,253 | 156,536
Financial Liabilities |  |
Investment contract reserves | 4,338,318 | 4,280,528
Life policy reserves, account values on life contracts | 86,906 | 85,066
Other policyholder funds | 644,383 | 649,557
Long-term debt | $ 264,781 | $ 248,191

X
- Definition The fair value of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts. + References No definition available. + Details
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- Definition Fair Value of the liability as of the balance sheet date to the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported. + References No definition available. + Details
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