Fair Value Measurements (Summarize Changes in Level 3 Assets and Liabilities) (Details) (Level 3, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0	$ 20,000
Earnings	(20,000)	(4,000)
Other Comprehensive Income	0	0
Purchases	31,000	4,000
Sales	(11,000)	(20,000)
Paydown/Maturities	0	0
In	0	0
Out	0	0
Ending balance	0	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	49,634,000	62,022,000
Earnings	2,304,000	1,836,000
Other Comprehensive Income	(4,622,000)	1,039,000
Purchases	19,953,000	4,424,000
Sales	(33,698,000)	(5,776,000)
Paydowns / Maturities	(3,429,000)	(12,604,000)
In	9,064,000	22,000
Out	(3,267,000)	(1,329,000)
Ending Balance	35,939,000	49,634,000
Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	42,864,000	59,065,000
Earnings	47,000	677,000
Other Comprehensive Income	(3,711,000)	309,000
Purchases	238,000	170,000
Sales	(15,244,000)	(4,753,000)
Paydowns / Maturities	(3,429,000)	(12,604,000)
In	0	0
Out	0	0
Ending Balance	20,765,000	42,864,000
Fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	42,864,000	59,065,000
Earnings	47,000	677,000
Other Comprehensive Income	(3,711,000)	309,000
Purchases	238,000	170,000
Sales	(15,244,000)	(4,753,000)
Paydowns / Maturities	(3,429,000)	(12,604,000)
In	0	0
Out	0	0
Ending Balance	20,765,000	42,864,000
Common stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,238,000	1,408,000
Earnings	0	0
Other Comprehensive Income	(911,000)	0
Purchases	11,343,000	0
Sales	(929,000)	(170,000)
Paydowns / Maturities	0	0
In	0	0
Out	0	0
Ending Balance	10,741,000	1,238,000
Preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,752,000	621,000
Earnings	(17,000)	(299,000)
Other Comprehensive Income	0	0
Purchases	3,430,000	3,430,000
Sales	(3,452,000)	0
Paydowns / Maturities	0	0
In	0	0
Out	0	0
Ending Balance	3,713,000	3,752,000
Equity securities available for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	4,990,000	2,029,000
Earnings	(17,000)	(299,000)
Other Comprehensive Income	(911,000)	0
Purchases	14,773,000	3,430,000
Sales	(4,381,000)	(170,000)
Paydowns / Maturities	0	0
In	0	0
Out	0	0
Ending Balance	14,454,000	4,990,000
Trading account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,780,000	928,000
Earnings	2,274,000	1,458,000
Other Comprehensive Income	0	730,000
Purchases	4,942,000	824,000
Sales	(14,073,000)	(853,000)
Paydowns / Maturities	0	0
In	9,064,000	22,000
Out	3,267,000	(1,329,000)
Ending Balance	$ 720,000	$ 1,780,000