Losses and Loss Adjustment Reserve (Tables)

12 Months Ended

Dec. 31, 2017

Reinsurance Disclosures [Abstract]

Effects of Reinsurance on Premiums Written and Earned

The effects of reinsurance on premiums written and earned at December 31 are as follows:

	2017				2016
(in thousands)	Written		Earned		Written		Earned
Direct premiums	$	604,623	$	592,267	$	591,142	$	592,123
Assumed premiums	—		—		—		—
Ceded premiums	604,610		592,254		591,124		592,105
Net premiums	$	13	$	13	$	18	$	18