Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2014

Related Party Transactions [Abstract]

Summary of related party transactions

(U.S. dollars in thousands)	2014		2013		2012
Reported net premiums written	$	91,261	$	73,085	$	61,146
Net losses incurred	$	38,927	$	29,042	$	37,664
Reported acquisition costs	$	35,711	$	25,275	$	24,014