Segmented Information Segmented Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Amortization of intangible assets	$ 558	$ 0	$ 600	$ 0
Amortization of intangible assests not allocated to segments	231	0
Property, Liability and Casualty Insurance Segment [Member]
Segment Reporting Information [Line Items]
Number of States in which Entity Operates	18,000
6411 Insurance Agents, Brokers and Service [Member]
Segment Reporting Information [Line Items]
Number of States in which Entity Operates	22,000
Amortization of intangible assets	$ 300
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Number of States in which Entity Operates	26