Segment Information (Schedule of Business Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues [Abstract]
Revenues	$ 97,197	$ 80,836	$ 188,647	$ 167,945
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	9,275	2,042	16,964	8,454
Standard Commercial Segment [Member]
Revenues [Abstract]
Revenues	20,083	19,341	40,464	39,682
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	2,468	(3,147)	4,354	(1,926)
Specialty Commercial Segment [Member]
Revenues [Abstract]
Revenues	62,418	58,702	124,675	121,184
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	7,727	9,465	17,448	19,389
Personal Segment [Member]
Revenues [Abstract]
Revenues	11,727	4,882	20,380	10,474
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	(76)	1,285	(372)	1,254
Corporate [Member]
Revenues [Abstract]
Revenues	2,969	(2,089)	3,128	(3,395)
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	$ (844)	$ (5,561)	$ (4,466)	$ (10,263)