Fair Value Measurements (Summarize Changes in Level 3 Assets and Liabilities) (Details) - Level 3 - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0	$ 0
Earnings	0	(20,000)
Other Comprehensive Income	0	0
Fair Value, Impairment of Intangible Assets (Excluding Goodwill)	0
Purchases	0	31,000
Sales	0	(11,000)
Paydown/Maturities	0	0
Out	0	0
Ending balance	0	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	35,939,000	49,634,000
Earnings	(869,000)	2,304,000
Other Comprehensive Income	(82,000)	(4,622,000)
Impairment of Intangible Assets (Excluding Goodwill)	(2,331,000)	0
Purchases	72,640,000	19,953,000
Sales	(72,229,000)	(33,698,000)
Paydowns / Maturities	(1,820,000)	(3,429,000)
Out	(19,266,000)	5,797,000
Ending Balance	11,982,000	35,939,000
Residential mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	154,000	154,000
Earnings	0	0
Other Comprehensive Income	0	0
Impairment of Intangible Assets (Excluding Goodwill)	0	0
Purchases	0	0
Sales	0	0
Paydowns / Maturities	0	0
Out	0	0
Ending Balance	154,000	154,000
Fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	20,765,000	42,864,000
Earnings	19,000	47,000
Other Comprehensive Income	191,000	(3,711,000)
Impairment of Intangible Assets (Excluding Goodwill)	0	0
Purchases	0	238,000
Sales	0	(15,244,000)
Paydowns / Maturities	(1,820,000)	(3,429,000)
Out	(18,802,000)	0
Ending Balance	353,000	20,765,000
Common stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	10,741,000	1,238,000
Earnings	0	0
Other Comprehensive Income	(273,000)	(911,000)
Impairment of Intangible Assets (Excluding Goodwill)	(2,331,000)	0
Purchases	0	11,343,000
Sales	(308,000)	(929,000)
Paydowns / Maturities	0	0
Out	0	0
Ending Balance	7,829,000	10,741,000
Preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,713,000	3,752,000
Earnings	(89,000)	(17,000)
Other Comprehensive Income	0	0
Impairment of Intangible Assets (Excluding Goodwill)	0	0
Purchases	0	3,430,000
Sales	0	(3,452,000)
Paydowns / Maturities	0	0
Out	0	0
Ending Balance	3,624,000	3,713,000
Equity securities available for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	14,454,000	4,990,000
Earnings	(89,000)	(17,000)
Other Comprehensive Income	(273,000)	(911,000)
Impairment of Intangible Assets (Excluding Goodwill)	(2,331,000)	0
Purchases	0	14,773,000
Sales	(308,000)	(4,381,000)
Paydowns / Maturities	0	0
Out	0	0
Ending Balance	11,453,000	14,454,000
Trading account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	720,000	1,780,000
Earnings	(799,000)	2,274,000
Other Comprehensive Income	0	0
Impairment of Intangible Assets (Excluding Goodwill)	0	0
Purchases	72,640,000	4,942,000
Sales	(71,921,000)	(14,073,000)
Paydowns / Maturities	0	0
Out	464,000	(5,797,000)
Ending Balance	$ 176,000	$ 720,000