Loss and Loss Adjustment Expenses (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary exposures to various asbestos related claims
Reserves for loss and loss adjustment expenses ("LAE")/Reserves for loss and LAE at beginning of year
Incurred losses and LAE during the current year	168
Less loss and LAE payments for claims occurring during the current year	1
Reserves for loss and LAE/Reserves for loss and LAE at end of year	$ 167