Federal Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net loss reserve discounting	$ 87,967,000	$ 97,561,000
Net unearned premiums	64,167,000	58,981,000
Employee benefits	19,912,000	39,752,000
Long-term incentive compensation plans	12,904,000	10,078,000
Temporary investment write-downs	7,586,000	8,236,000
Net operating loss	2,818,000	12,120,000
Tax credits	17,042,000	14,150,000
Other	10,088,000	9,056,000
Total deferred tax assets	222,484,000	249,934,000
Deferred policy acquisition costs	59,164,000	53,187,000
Unrealized gains on investment securities	31,345,000	67,501,000
Other investments-related items, net	618,000	2,488,000
Accelerated depreciation and amortization	8,744,000	7,622,000
Total deferred tax liabilities	99,871,000	130,798,000
Net deferred federal income tax asset	122,613,000	119,136,000
Tax benefits related to compensation expense deductions for share-based compensation awards	$ 19,200,000	$ 17,700,000	$ 16,600,000

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions, before any related valuation allowance, arising from unrealized losses on securities which can only be deducted for tax purposes when the losses are realized, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

No definition available.