Fair Value Disclosures (Carrying Value And Fair Value Of The Financial Instruments That Are Not Recognized Or Are Not Carried At Fair Value) (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Funds withheld under reinsurance		$ 94,417	$ 75,161
Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate		1,201,806	1,448,215
Policy loans		43,858	48,272
Other investments		27,534	10,896
Total financial assets		1,273,198	1,507,383
Individual and group annuities, subject to discretionary withdrawal	[1]	676,586	764,949
Funds withheld under reinsurance		94,417	75,161
Debt		1,250,602	1,296,139
Obligations under securities agreements			95,986
Total financial liabilities		2,021,605	2,232,235
Level 1 | Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate		0	0
Policy loans		43,858	48,272
Other investments		0	0
Total financial assets		43,858	48,272
Individual and group annuities, subject to discretionary withdrawal	[1]	0	0
Funds withheld under reinsurance		94,417	75,161
Debt		0	0
Obligations under securities agreements			95,986
Total financial liabilities		94,417	171,147
Level 2 | Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate		0	0
Policy loans		0	0
Other investments		0	0
Total financial assets		0	0
Individual and group annuities, subject to discretionary withdrawal	[1]	0	0
Funds withheld under reinsurance		0	0
Debt		1,250,602	1,296,139
Obligations under securities agreements			0
Total financial liabilities		1,250,602	1,296,139
Level 3 | Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate		1,201,806	1,448,215
Policy loans		0	0
Other investments		27,534	10,896
Total financial assets		1,229,340	1,459,111
Individual and group annuities, subject to discretionary withdrawal	[1]	676,586	764,949
Funds withheld under reinsurance		0	0
Debt		0	0
Obligations under securities agreements			0
Total financial liabilities		676,586	764,949
Carrying Value | Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate		1,151,256	1,272,616
Policy loans		43,858	48,272
Other investments		27,534	10,896
Total financial assets		1,222,648	1,331,784
Individual and group annuities, subject to discretionary withdrawal	[1]	666,068	743,951
Funds withheld under reinsurance		94,417	75,161
Debt		1,171,382	1,171,079
Obligations under securities agreements			95,986
Total financial liabilities		$ 1,931,867	$ 2,086,177

[1] Only the fair value of the Company’s policy reserves for investment-type contracts (those without significant mortality or morbidity risk) is reflected in the table above.