|
Summary of Fair Value Estimates for Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Dec. 31, 2011
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
|
| Fixed maturity securities available for sale, carrying value |
$ 2,878,625 |
|
$ 2,682,142 |
| Equity securities available for sale, carrying value |
37,453 |
|
36,689 |
| Mortgage loans, carrying value |
563,214 |
563,214 |
604,772 |
| Policy loans, carrying value |
78,172 |
|
80,375 |
| Cash and short-term investments, carrying value |
34,212 |
|
59,752 |
| Separate account assets, carrying value |
343,721 |
|
316,609 |
| Individual and group annuities, carrying value |
1,125,833 |
|
1,082,324 |
| Supplementary contracts without life contingencies, carrying value |
54,694 |
|
56,193 |
| Separate account liabilities, carrying value |
343,721 |
|
316,609 |
| Other policyholder funds - GMWB, carrying value |
(409) |
|
(187) |
| Available for sale, fair value |
2,916,078 |
|
2,718,831 |
| Equity securities available for sale, at fair value |
37,453 |
|
36,689 |
| Mortgage loans, fair value |
602,559 |
|
642,905 |
| Policy loans, fair value |
78,172 |
|
80,375 |
| Cash and short-term investments, fair value |
34,212 |
|
59,752 |
| Separate account assets, fair value |
343,721 |
|
316,609 |
| Individual and group annuities, fair value |
1,105,053 |
|
1,062,407 |
| Supplementary contracts without life contingencies, fair value |
53,869 |
|
54,824 |
| Separate account liabilities, fair value |
343,721 |
|
316,609 |
| Other policyholder funds - GMWB, fair value |
$ (409) |
|
$ (187) |