Income Taxes (Deferred Tax Components) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Reserve for losses and loss expenses	$ 22,567	$ 22,843
Equity compensation	15,828	13,012
Unearned premium	14,299	12,688
Deferred acquisition costs	10,604	10,843
Other-than-temporary impairments	407	408
Mark-to-market on securities acquired	0	114
Total deferred tax assets	63,705	59,908
Deferred tax liabilities:
Intangible assets	(14,743)	(15,629)
Realized gains	(6,980)	(11,372)
Depreciation	(2,942)	(3,509)
Unrealized appreciation and timing differences on investments	(56)	(293)
Market discount on bonds	(271)	(727)
Other	(1,244)	(2,798)
Total deferred tax liabilities	(26,236)	(34,328)
Net deferred tax assets	$ 37,469	$ 25,580