Reinsurance (Tables)

12 Months Ended

Dec. 31, 2012

Reinsurance [Abstract]

Schedule of the effect of reinsurance on premiums written and earned

	2012 Premiums						2011 Premiums						2010 Premiums
	Written			Earned			Written			Earned			Written			Earned
	(In thousands)
Gross	$	328,823		$	306,994		$	272,101		$	264,896		$	228,424		$	239,430
Ceded		(16,305	)		(16,305	)		(13,881	)		(13,881	)		(20,549	)		(20,549	)
Net premiums	$	312,518		$	290,689		$	258,220		$	251,015		$	207,875		$	218,881

Schedule of the amounts recoverable from reinsurers

	December 31,
	2012		2011
	(In thousands)
Unpaid losses recoverable:
Case basis	$	31,105	$	35,069
Incurred but not reported		24,085		25,868
Paid losses recoverable		746		764
Experience-rated commissions recoverable		45,416		34,511
Total	$	101,352	$	96,212

Schedule of unsecured reinsurance recoverables from reinsurers

Hannover Reinsurance (Ireland) Limited (A+)	$	31,904
Aspen Insurance (Bermuda) Limited (A)		14,191
Odyssey America Reinsurance Corporation (A)		12,426
Minnesota Workers’ Compensation Reinsurance Association (NR)		8,641
Clearwater Insurance Company (B+)		5,769
Finial Reinsurance Company (A-)		4,975
SCOR Reinsurance Company (A)		4,904
Other reinsurers		18,542
Total reinsurance recoverables		101,352
Letters of credit and funds held		(58,993	)
Total unsecured reinsurance recoverables	$	42,359