Reinsurance (Tables)

12 Months Ended

Dec. 31, 2016

Insurance [Abstract]

Summary of the effect of reinsurance on premiums written and earned

The effect of reinsurance on premiums written and earned was as follows:

(In thousands)	2016 Premiums						2015 Premiums						2014 Premiums
	Written			Earned			Written			Earned			Written			Earned
Direct	$	794,377		$	790,791		$	780,982		$	772,968		$	761,043		$	755,623
Assumed	40,637			37,805			31,236			22,691			18,566			12,987
Ceded	(96,481		)	(95,315		)	(102,933		)	(101,510		)	(77,760		)	(68,879		)
Net premiums	$	738,533		$	733,281		$	709,285		$	694,149		$	701,849		$	699,731