Investments (Commercial Mortgage and Other Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Commercial mortgage loans	$ 345,284	$ 379,132
Commercial mortgage loans, Percentage	86.90%	88.30%
Valuation allowance	(1,256)	(2,177)
Total net commercial and agricultural mortgage loans by property type	396,251	426,981
Total commercial mortgage and other loans, net of valuation allowance	398,991	426,981
Total Commercial Mortgage By Propterty Type	397,507	429,158
Other Loans and Leases Receivable	2,740	0
Office buildings [Member]
Commercial mortgage loans	40,976	59,074
Commercial mortgage loans, Percentage	10.30%	13.80%
Retail stores [Member]
Commercial mortgage loans	72,325	71,546
Commercial mortgage loans, Percentage	18.20%	16.70%
Apartment Complexes [Member]
Commercial mortgage loans	125,045	120,066
Commercial mortgage loans, Percentage	31.50%	28.00%
Industrial Buildings [Member]
Commercial mortgage loans	88,009	114,619
Commercial mortgage loans, Percentage	22.10%	26.70%
Agricultural Properties [Member]
Commercial mortgage loans	52,223	50,026
Commercial mortgage loans, Percentage	13.10%	11.70%
Hospitality [Member]
Commercial mortgage loans	5,133	4,621
Commercial mortgage loans, Percentage	1.30%	1.10%
Other [Member]
Commercial mortgage loans	13,796	9,206
Commercial mortgage loans, Percentage	3.50%	2.00%
California [Member]
Commercial mortgage loans, Percentage	17.00%
Ohio [Member]
Commercial mortgage loans, Percentage	9.00%
New York [Member]
Commercial mortgage loans, Percentage	8.00%
Total Percentage [Member]
Commercial mortgage loans, Percentage	100.00%	100.00%
Uncollateralized Loans [Member]
Other Loans and Leases Receivable	$ 2,740	$ 0
Texas [Member]
Commercial mortgage loans, Percentage	11.00%