Investments Realized Gain (Loss) on Investments (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Gain (Loss) on Investments [Line Items]
Realized gains and losses on securities that are not going to be held before FV recovers	$ 35,000
Realized gains and losses on securities previously impaired		$ 100,000	$ 400,000
Proceeds from Sale of Available-for-sale Securities, Fixed Maturities	0	3,074,000	316,000
Proceeds from Sale of Available-for-sale Securities, Equity	43,163,000	15,029,000	5,996,000
Gain (Loss) on Sale, Calls and Maturities of Fixed Maturities	(111,000)	359,000	199,000
Gain (Loss) on Sale of Equity Securities	37,000	49,000	(436,000)
Gain (Loss) on Sale of Other Long-Term Investments	0	0	(10,000)
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	(74,000)	408,000	(247,000)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	2,998,000
Other-than-temporary Impairment Losses on Fixed Maturities		0	0
Other Than Temporary Impairment Losses on Equity Securities	2,387,000	427,000	0
Other Than Temporary Impairment Losses on Equity Securities	5,385,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	(5,385,000)	(427,000)	0
Realized investment gains, net	$ (5,459,000)	(19,000)	(247,000)
Available-for-sale Securities [Member]
Gain (Loss) on Investments [Line Items]
Number of Debt Securities Sold	2
Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Gross Realized Gains	$ 0	235,000	7,000
Available-for-sale Securities, Gross Realized Losses	0	0	1,000
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Gross Realized Gains	634,000	118,000	0
Available-for-sale Securities, Gross Realized Losses	$ 599,000	$ 169,000	$ 428,000
Equity Funds [Member]
Gain (Loss) on Investments [Line Items]
Number of Equity Securities Sold	6	3
Held-to-maturity Securities [Member]
Gain (Loss) on Investments [Line Items]
Number of Debt Securities Sold	0	0	0
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	$ 111,000