Investments (Mortgage Loans and Real Estate) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	$ 153,390		$ 133,415
Allowance for possible losses, amount	(650)		(650)
Totals, amount	152,740	[1]	132,765	[1]
Mortgage loans, percentage	100.00%		100.00%
Allowance for possible losses, percentage	(0.40%)		(0.50%)
Totals, percentage	99.60%	[1]	99.50%	[1]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	650		650
Provision	0		0
Releases	0		0
Balance, end of period	650		650
Less than 50% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	49,514		57,445
Mortgage loans, percentage	32.30%		43.00%
50% to 60% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	56,530		23,339
Mortgage loans, percentage	36.90%		17.50%
60% to 70% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	18,932		20,120
Mortgage loans, percentage	12.30%		15.10%
70% to 80% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	8,476		9,723
Mortgage loans, percentage	5.50%		7.30%
80% to 90% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	0		0
Mortgage loans, percentage	0.00%		0.00%
Greater than 90% [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan, amount	$ 19,938		$ 22,788
Mortgage loans, percentage	13.00%		17.10%

[1] Loan-to-Value Ratio determined using the most recent appraised value.