Loss and Loss Adjustment Expenses (Tables)

12 Months Ended

Dec. 31, 2012

Loss and Loss Adjustment Expenses [Abstract]

Reconciliation of beginning and ending reserve balances, net of related amounts recoverable from reinsurers

	Year Ended December 31,
	2012			2011			2010
	(In thousands)
Reserves for loss and loss adjustment expenses (“LAE”)	$	538,214		$	532,204		$	534,655
Less amounts recoverable from reinsurers on unpaid loss and LAE		60,937			65,536			60,435
Reserves for loss and LAE, net of related amounts recoverable from reinsurers, at beginning of year		477,277			466,668			474,220
Add:
Provision for loss and LAE for claims occurring in the current year, net of reinsurance		222,393			196,269			179,022
Change in estimated loss and LAE for claims occurring in prior years, net of reinsurance		(2,490	)		(6,563	)		(21,634	)
Incurred losses during the current year, net of reinsurance		219,903			189,706			157,388
Less loss and LAE payments for claims, net of reinsurance, occurring during:
Current year		50,423			53,213			47,385
Prior years		131,497			125,884			117,555
		181,920			179,097			164,940
Reserves for loss and LAE, net of related amounts recoverable from reinsurers, at end of year		515,260			477,277			466,668
Add amounts recoverable from reinsurers on unpaid loss and LAE		55,190			60,937			65,536
Reserves for loss and LAE	$	570,450		$	538,214		$	532,204

Summary exposures to various asbestos related claims

	Year Ended December 31,
	2012		2011		2010
	(In thousands)
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 at end of year	$	167	$	—	$	—