Income Taxes (Deferred Tax Components) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Increase in valuation allowance	$ 1,221
Deferred tax assets:
Reserve for losses and loss expenses	21,644	22,567
Equity compensation	15,316	15,828
Unearned premium	16,921	14,299
Deferred acquisition costs	11,184	10,604
Other-than-temporary impairments	0	407
Net loss carryforward	7,958	7,642
Total deferred tax assets	73,023	71,347
Deferred tax liabilities:
Intangible assets	(13,856)	(14,743)
Realized gains	(12,819)	(6,980)
Depreciation	(2,513)	(2,942)
Unrealized appreciation and timing differences on investments	(94)	(56)
Market discount on bonds	(740)	(271)
Other	(2,965)	(1,244)
Total deferred tax liabilities	(32,987)	(26,236)
Net deferred taxes before valuation allowance	40,036	45,111
Valuation allowance	(6,421)	(7,642)
Net deferred tax assets	$ 33,615	$ 37,469