Summary of Significant Accounting Policies Cost of Customer Relationships Acquired (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010
Fair Value Inputs, Assets, Quantitative Information [Line Items]
2013	$ 2,112
2014	1,933
2015	1,772
2016	1,658
2017	1,535
Thereafter	17,172
Net	26,182
Effects of unrealized (gains) losses on CCRA	(1,066)
Total	25,116
Intangible Assets Arising from Insurance Contracts Acquired in Business Combination, Amortization Expense, Fiscal Year Maturity [Abstract]
Balance at January 1, 2010	17,160	17,160
Acquisition	0
Adjustments	0
Balance at December 31, 2010, 2011 and 2012	$ 17,160	$ 17,160