Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Assets:
Policy loans	$ 12,911		$ 12,454
Accrued investment income	29,481		32,169
Receivables from parents and affiliates	56,255		35,594
Other Long-Term Investments	110,855		60,585
Liabilities:
Cash collateral for loaned securities	22,273		47,896
Short-term debt	200,000		205,000
Payables To Parent And Affiliates	60,990		111,403
Fair Value, Inputs, Level 3 [Member]
Assets:
Receivables from parents and affiliates	22,526		6,347
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	413,330	[1]	398,991	[1]
Policy loans	12,911	[1]	12,454	[1]
Cash	300	[1]	1,417	[1]
Accrued investment income	29,481	[1]	32,169	[1]
Other assets	2,546	[1]	11,190	[1]
Total Assets Financial Instruments Not Carried At Fair Value	472,879	[1]	467,838	[1]
Receivables from parents and affiliates	12,270	[1]	10,177	[1]
Other Long-Term Investments	2,041	[1]	1,440	[1]
Liabilities:
Investment contracts- policyholders' account balances	90,560	[1]	85,672	[1]
Cash collateral for loaned securities	22,273	[1]	47,896	[1]
Short-term debt	200,000	[1]	205,000	[1]
Other liabilities	81,937	[1]	101,656	[1]
Separate account liabilities - investment contracts	534	[1]	796	[1]
Total Financial Instrument Liabilities Not Carried At Fair Value	431,127	[1]	526,224	[1]
Payables To Parent And Affiliates	35,823	[1]	85,204	[1]
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets:
Commercial mortgage and other loans	439,776		422,584
Policy loans	12,911		12,454
Cash	300		1,417
Accrued investment income	29,481		32,169
Other assets	2,546		11,190
Total Assets Financial Instruments Not Carried At Fair Value	499,717		491,614
Receivables from parents and affiliates	12,270		10,177
Other Long-Term Investments	2,433		1,623
Liabilities:
Investment contracts- policyholders' account balances	89,008		84,153
Cash collateral for loaned securities	22,273		47,896
Short-term debt	201,891		218,488
Other liabilities	81,937		101,656
Separate account liabilities - investment contracts	534		796
Total Financial Instrument Liabilities Not Carried At Fair Value	431,466		538,193
Payables To Parent And Affiliates	35,823		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	300		1,417
Accrued investment income	0		0
Other assets	0		0
Total Assets Financial Instruments Not Carried At Fair Value	300		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	2,678		0
Policy loans	0		0
Cash	0		0
Accrued investment income	29,481		32,169
Other assets	2,546		11,190
Total Assets Financial Instruments Not Carried At Fair Value	46,975		53,536
Receivables from parents and affiliates	12,270		10,177
Other Long-Term Investments	0		0
Liabilities:
Investment contracts- policyholders' account balances	0		0
Cash collateral for loaned securities	22,273		47,896
Short-term debt	201,891		218,488
Other liabilities	81,937		101,656
Separate account liabilities - investment contracts	534		796
Total Financial Instrument Liabilities Not Carried At Fair Value	342,458		454,040
Payables To Parent And Affiliates	35,823		85,204
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Commercial mortgage and other loans	437,098		422,584
Policy loans	12,911		12,454
Cash	0		0
Accrued investment income	0		0
Other assets	0		0
Total Assets Financial Instruments Not Carried At Fair Value	452,442		436,661
Receivables from parents and affiliates	0		0
Other Long-Term Investments	2,433		1,623
Liabilities:
Investment contracts- policyholders' account balances	89,008		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	89,008		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.