Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Fair Value
Less Than 12 Months	$ 60,801		$ 56,025
12 Months or Longer	29,709		64,388
Total	90,510		120,413
Unrealized Losses
Less Than 12 Months	(900)		(618)
12 Months or Longer	(768)		(1,179)
Total	(1,668)		(1,797)
Other-than-temporary impairment credit loss
Net impairment losses recognized in net loss	26	41
Bonds:
Fair Value
Less Than 12 Months	60,667		55,847
12 Months or Longer	29,612		64,295
Total	90,279		120,142
Unrealized Losses
Less Than 12 Months	(833)		(595)
12 Months or Longer	(751)		(1,149)
Total	(1,584)		(1,744)
Obligations of states, municipalities, and political subdivisions
Fair Value
Less Than 12 Months			1,569
12 Months or Longer	3,764		9,646
Total	3,764		11,215
Unrealized Losses
Less Than 12 Months			(4)
12 Months or Longer	(269)		(245)
Total	(269)		(249)
Corporate debt
Fair Value
Less Than 12 Months	32,482		23,673
12 Months or Longer	25,807		49,690
Total	58,289		73,363
Unrealized Losses
Less Than 12 Months	(554)		(510)
12 Months or Longer	(481)		(870)
Total	(1,035)		(1,380)
RMBS
Fair Value
Less Than 12 Months	24,555		29,101
12 Months or Longer	41		46
Total	24,596		29,147
Unrealized Losses
Less Than 12 Months	(270)		(46)
12 Months or Longer	(1)		(1)
Total	(271)		(47)
CMBS
Fair Value
Less Than 12 Months	730		712
12 Months or Longer			4,913
Total	730		5,625
Unrealized Losses
Less Than 12 Months	(9)		(31)
12 Months or Longer			(33)
Total	(9)		(64)
CDO/ABS
Fair Value
Less Than 12 Months	2,900		792
Total	2,900		792
Unrealized Losses
Less Than 12 Months			(4)
Total			(4)
Other long-term investments
Fair Value
Less Than 12 Months	134		178
12 Months or Longer			8
Total	134		186
Unrealized Losses
Less Than 12 Months	(67)		(23)
12 Months or Longer			(1)
Total	(67)		(24)
Common stocks
Fair Value
12 Months or Longer	97		85
Total	97		85
Unrealized Losses
12 Months or Longer	(17)		(29)
Total	(17)		(29)
Corporate debt and RMBS
Other-than-temporary impairment credit loss
Net impairment losses recognized in net loss	$ 26,000