|
Fair Value Measurements - Summary of Fair Value Estimates for Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2013
|
Dec. 31, 2012
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, carrying value |
$ 2,764,263 |
$ 2,788,141 |
| Mortgage loans, carrying value |
678,506 |
677,380 |
| Policy loans, carrying value |
75,809 |
77,133 |
| Fixed maturity securities available for sale, fair value |
2,789,733 |
2,808,202 |
| Policy loans, fair value |
75,809 |
77,133 |
| Separate account assets, fair value |
360,497 |
340,093 |
| Separate account liabilities, fair value |
360,497 |
340,093 |
|
Debt securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, fair value |
2,764,263 |
2,788,141 |
|
Equity securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, fair value |
25,470 |
20,061 |
|
Carrying Value
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Mortgage loans, carrying value |
675,106 |
674,034 |
| Policy loans, carrying value |
75,809 |
77,133 |
| Cash and short-term investments, carrying value |
22,264 |
31,928 |
| Separate account assets, carrying value |
360,497 |
340,093 |
| Individual and group annuities, carrying value |
1,109,207 |
1,130,032 |
| Supplementary contracts without life contingencies, carrying value |
53,604 |
54,321 |
| Separate account liabilities, carrying value |
360,497 |
340,093 |
| Other policyholder funds - GMWB, carrying value |
2,345 |
(1,080) |
| Policy loans, fair value |
75,809 |
77,133 |
|
Carrying Value | Debt securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, carrying value |
2,764,263 |
2,788,141 |
|
Carrying Value | Equity securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, carrying value |
25,470 |
20,061 |
|
Fair Value
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Policy loans, carrying value |
75,809 |
77,133 |
| Mortgage loans, fair value |
727,152 |
722,098 |
| Policy loans, fair value |
75,809 |
77,133 |
| Cash and short-term investments, fair value |
22,264 |
31,928 |
| Separate account assets, fair value |
360,497 |
340,093 |
| Individual and group annuities, fair value |
1,088,265 |
1,108,987 |
| Supplementary contracts without life contingencies, fair value |
52,661 |
53,389 |
| Separate account liabilities, fair value |
360,497 |
340,093 |
| Other policyholder funds - GMWB, fair value |
2,345 |
(1,080) |
|
Fair Value | Debt securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, fair value |
2,764,263 |
2,788,141 |
|
Fair Value | Equity securities
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fixed maturity securities available for sale, fair value |
$ 25,470 |
$ 20,061 |