Schedule I Summary of Investments-Other Than Investments in Related Parties: Summary of Investment Holdings, Schedule of Investments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Summary of Investments, Other than Investments in Related Parties, Cost	$ 782,676
Summary of Investments, Other than Investments in Related Parties, Fair Value	811,356
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	811,356
Policy Loans
Summary of Investments, Other than Investments in Related Parties, Cost	22,165
Summary of Investments, Other than Investments in Related Parties, Fair Value	22,165
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	22,165
Short-term Investments
Summary of Investments, Other than Investments in Related Parties, Cost	34,006
Summary of Investments, Other than Investments in Related Parties, Fair Value	34,006
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	34,006
Other Long-term Investments
Summary of Investments, Other than Investments in Related Parties, Cost	12,969
Summary of Investments, Other than Investments in Related Parties, Fair Value	12,969
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	12,969
US Government and Government Agencies and Authorities
Summary of Investments, Other than Investments in Related Parties, Cost	67,371
Summary of Investments, Other than Investments in Related Parties, Fair Value	68,900
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	68,900
US States and Political Subdivisions Debt Securities
Summary of Investments, Other than Investments in Related Parties, Cost	260,086
Summary of Investments, Other than Investments in Related Parties, Fair Value	268,225
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	268,225
Foreign Government Debt
Summary of Investments, Other than Investments in Related Parties, Cost	21,888
Summary of Investments, Other than Investments in Related Parties, Fair Value	21,968
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	21,968
Public Utility, Bonds
Summary of Investments, Other than Investments in Related Parties, Cost	51,244
Summary of Investments, Other than Investments in Related Parties, Fair Value	51,668
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	51,668
All Other Debt Securities Member
Summary of Investments, Other than Investments in Related Parties, Cost	284,365
Summary of Investments, Other than Investments in Related Parties, Fair Value	300,851
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	300,851
Redeemable Preferred Stock
Summary of Investments, Other than Investments in Related Parties, Cost	6,323
Summary of Investments, Other than Investments in Related Parties, Fair Value	7,990
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	7,990
Debt Securities
Summary of Investments, Other than Investments in Related Parties, Cost	691,277
Summary of Investments, Other than Investments in Related Parties, Fair Value	719,602
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	719,602
Public Utility, Equities
Summary of Investments, Other than Investments in Related Parties, Cost	722
Summary of Investments, Other than Investments in Related Parties, Fair Value	715
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	715
Banks, Trust and Insurance, Equities
Summary of Investments, Other than Investments in Related Parties, Cost	215
Summary of Investments, Other than Investments in Related Parties, Fair Value	216
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	216
Industrial, Miscellaneous, and All Others
Summary of Investments, Other than Investments in Related Parties, Cost	5,967
Summary of Investments, Other than Investments in Related Parties, Fair Value	6,085
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	6,085
Nonredeemable Preferred Stock
Summary of Investments, Other than Investments in Related Parties, Cost	15,355
Summary of Investments, Other than Investments in Related Parties, Fair Value	15,598
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	15,598
Equity Securities
Summary of Investments, Other than Investments in Related Parties, Cost	22,259
Summary of Investments, Other than Investments in Related Parties, Fair Value	22,614
Summary of Investments, Other than Investments in Related Parties, Carrying Amount	$ 22,614