Fair Value of Assets and Liabilities (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Separate Account assets transferred from Level 1 to Level 2	$ 0	$ 0	$ 0	$ 1,900,000
Separate Account Assets Invested In Real Estate	$ 87,500,000		$ 87,500,000		$ 84,100,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization Rates	4.75%		4.75%		5.00%
Discount Rates	6.00%		6.00%		6.75%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization Rates	10.00%		10.00%		10.00%
Discount Rates	11.00%		11.00%		11.00%
Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization Rates	6.16%		6.16%		6.68%
Discount Rates	6.98%		6.98%		7.66%
Internal Investment Grade | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Fair Value, Net	$ 700,000		$ 700,000		$ 600,000