Schedule IV - Reinsurance (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross Amount	$ 434,022	$ 369,735	$ 344,642
Ceded to Other Companies	76,685	54,413	57,039
Assumed From Other Companies	3,204	4,114	5,438
Net Amount	360,541	319,436	293,041
Percentage of Amount Assumed to Net	0.89%	1.29%	1.86%
Property, Liability and Casualty Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross Amount	434,022	369,735	344,642
Ceded to Other Companies	76,685	54,413	57,039
Assumed From Other Companies	3,204	4,114	5,438
Net Amount	$ 360,541	$ 319,436	$ 293,041
Percentage of Amount Assumed to Net	0.89%	1.29%	1.86%