Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Assets:
Policy loans	$ 12,884		$ 12,454
Accrued investment income	27,009		32,169
Receivables from parents and affiliates	56,936		35,594
Other Long-Term Investments	85,601		60,585
Liabilities:
Cash collateral for loaned securities	37,404		47,896
Short-term debt	215,000		205,000
Payables To Parent And Affiliates	57,308		111,403
Fair Value, Inputs, Level 3 [Member]
Assets:
Receivables from parents and affiliates	27,762		6,347
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	414,676	[1]	398,991	[1]
Policy loans	12,884	[1]	12,454	[1]
Cash	202	[1]	1,417	[1]
Accrued investment income	27,009	[1]	32,169	[1]
Other assets	2,935	[1]	11,190	[1]
Total Assets Financial Instruments Not Carried At Fair Value	471,909	[1]	467,838	[1]
Receivables from parents and affiliates	12,423	[1]	10,177	[1]
Other Long-Term Investments	1,780	[1]	1,440	[1]
Liabilities:
Investment contracts- policyholders' account balances	89,746	[1]	85,672	[1]
Cash collateral for loaned securities	37,404	[1]	47,896	[1]
Short-term debt	215,000	[1]	205,000	[1]
Other liabilities	88,040	[1]	101,656	[1]
Separate account liabilities - investment contracts	609	[1]	796	[1]
Total Financial Instrument Liabilities Not Carried At Fair Value	462,953	[1]	526,224	[1]
Payables To Parent And Affiliates	32,154	[1]	85,204	[1]
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	444,611		422,584
Policy loans	12,884		12,454
Cash	202		1,417
Accrued investment income	27,009		32,169
Other assets	2,935		11,190
Total Assets Financial Instruments Not Carried At Fair Value	502,230		491,614
Receivables from parents and affiliates	12,423		10,177
Other Long-Term Investments	2,166		1,623
Liabilities:
Investment contracts- policyholders' account balances	88,865		84,153
Cash collateral for loaned securities	37,404		47,896
Short-term debt	218,897		218,488
Other liabilities	88,040		101,656
Separate account liabilities - investment contracts	609		796
Total Financial Instrument Liabilities Not Carried At Fair Value	465,969		538,193
Payables To Parent And Affiliates	32,154		85,204
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Commercial mortgage and other loans	0		0
Policy loans	0		0
Cash	202		1,417
Accrued investment income	0		0
Other assets	0		0
Total Assets Financial Instruments Not Carried At Fair Value	202		1,417
Receivables from parents and affiliates	0		0
Other Long-Term Investments	0		0
Liabilities:
Investment contracts- policyholders' account balances	0		0
Cash collateral for loaned securities	0		0
Short-term debt	0		0
Other liabilities	0		0
Separate account liabilities - investment contracts	0		0
Total Financial Instrument Liabilities Not Carried At Fair Value	0		0
Payables To Parent And Affiliates	0		0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Commercial mortgage and other loans	2,680		0
Policy loans	0		0
Cash	0		0
Accrued investment income	27,009		32,169
Other assets	2,935		11,190
Total Assets Financial Instruments Not Carried At Fair Value	45,047		53,536
Receivables from parents and affiliates	12,423		10,177
Other Long-Term Investments	0		0
Liabilities:
Investment contracts- policyholders' account balances	0		0
Cash collateral for loaned securities	37,404		47,896
Short-term debt	218,897		218,488
Other liabilities	88,040		101,656
Separate account liabilities - investment contracts	609		796
Total Financial Instrument Liabilities Not Carried At Fair Value	377,104		454,040
Payables To Parent And Affiliates	32,154		85,204
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Commercial mortgage and other loans	441,931		422,584
Policy loans	12,884		12,454
Cash	0		0
Accrued investment income	0		0
Other assets	0		0
Total Assets Financial Instruments Not Carried At Fair Value	456,981		436,661
Receivables from parents and affiliates	0		0
Other Long-Term Investments	2,166		1,623
Liabilities:
Investment contracts- policyholders' account balances	88,865		84,153
Cash collateral for loaned securities	0		0
Short-term debt	0		0
Other liabilities	0		0
Separate account liabilities - investment contracts	0		0
Total Financial Instrument Liabilities Not Carried At Fair Value	88,865		84,153
Payables To Parent And Affiliates	$ 0		$ 0

[1] Carrying values presented herein differ from those in the Company’s Unaudited Interim 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.