Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Assets:
Policy loans	$ 12,454		$ 11,957
Accrued investment income	32,169		44,656
Receivables from parents and affiliates	35,594		22,833
Other Long-Term Investments	60,585		175,661
Liabilities:
Cash collateral for loaned securities	47,896		38,976
Short-term debt	205,000		0
Long-term debt	0		400,000
Payables To Parent And Affiliates	111,403		119,504
Fair Value, Inputs, Level 3 [Member]
Assets:
Receivables from parents and affiliates	6,347		1,995
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	398,991	[1]	426,981
Policy loans	12,454	[1]	11,957
Cash	1,417	[1]	266
Accrued investment income	32,169	[1]	44,656
Other assets	11,190	[1]	12,410
Total Assets Financial Instruments Not Carried At Fair Value	467,838	[1]	497,346
Receivables from parents and affiliates	10,177	[1]	199
Other Long-Term Investments	1,440	[1]	877
Liabilities:
Investment contracts- policyholders' account balances	85,672	[1]	75,242
Cash collateral for loaned securities	47,896	[1]	38,976
Short-term debt	205,000	[1]	0
Long-term debt	0	[1]	400,000
Other liabilities	101,656	[1]	99,094
Separate account liabilities - investment contracts	796	[1]	964
Total Financial Instrument Liabilities Not Carried At Fair Value	526,224	[1]	709,229
Payables To Parent And Affiliates	85,204	[1]	94,953
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	422,584		473,964
Policy loans	12,454		11,957
Cash	1,417		266
Accrued investment income	32,169		44,656
Other assets	11,190		12,410
Total Assets Financial Instruments Not Carried At Fair Value	491,614		544,435
Receivables from parents and affiliates	10,177		199
Other Long-Term Investments	1,623		983
Liabilities:
Investment contracts- policyholders' account balances	84,153		78,159
Cash collateral for loaned securities	47,896		38,976
Short-term debt	218,488		0
Long-term debt	0		426,827
Other liabilities	101,656		99,094
Separate account liabilities - investment contracts	796		964
Total Financial Instrument Liabilities Not Carried At Fair Value	538,193		738,973
Payables To Parent And Affiliates	85,204		94,953
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Commercial mortgage and other loans	0
Policy loans	0
Cash	1,417
Accrued investment income	0
Other assets	0
Total Assets Financial Instruments Not Carried At Fair Value	1,417
Receivables from parents and affiliates	0
Other Long-Term Investments	0
Liabilities:
Investment contracts- policyholders' account balances	0
Cash collateral for loaned securities	0
Short-term debt	0
Long-term debt	0
Other liabilities	0
Separate account liabilities - investment contracts	0
Total Financial Instrument Liabilities Not Carried At Fair Value	0
Payables To Parent And Affiliates	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Commercial mortgage and other loans	0
Policy loans	0
Cash	0
Accrued investment income	32,169
Other assets	11,190
Total Assets Financial Instruments Not Carried At Fair Value	53,536
Receivables from parents and affiliates	10,177
Other Long-Term Investments	0
Liabilities:
Investment contracts- policyholders' account balances	0
Cash collateral for loaned securities	47,896
Short-term debt	218,488
Long-term debt	0
Other liabilities	101,656
Separate account liabilities - investment contracts	796
Total Financial Instrument Liabilities Not Carried At Fair Value	454,040
Payables To Parent And Affiliates	85,204
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Commercial mortgage and other loans	422,584
Policy loans	12,454
Cash	0
Accrued investment income	0
Other assets	0
Total Assets Financial Instruments Not Carried At Fair Value	436,661
Receivables from parents and affiliates	0
Other Long-Term Investments	1,623
Liabilities:
Investment contracts- policyholders' account balances	84,153
Cash collateral for loaned securities	0
Short-term debt	0
Long-term debt	0
Other liabilities	0
Separate account liabilities - investment contracts	0
Total Financial Instrument Liabilities Not Carried At Fair Value	84,153
Payables To Parent And Affiliates	$ 0

[1] Carrying values presented herein differ from those in the Company’s Statements of Financial Position because certain items within the respective financial statement captions are not considered financial instruments or out of scope under authoritative guidance relating to disclosures of the fair value of financial instruments. Financial statement captions excluded from the above table are not considered financial instruments.