Acquisition and Disposals (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Business Combinations [Abstract]

Schedule of restructuring costs

As a part of the ongoing integration of Catlin's operations, the Company incurs costs associated with restructuring the systems, processes and workforce. These costs include such items as severance, retention, facilities and consulting and other costs. The Company separately identifies such costs and includes these expenses within Corporate and Other:

(U.S. dollars in thousands)	Severance related costs		Retention and other compensation costs		Facilities-related costs		Consulting and other		Total
Liabilities at December 31, 2015	$	16,127	$	16,969	$	818	$	23,375	$	57,289
Costs incurred in 2016	16,758		8,006		6,103		24,120		54,987
2016 payments	16,535		17,466		1,040		16,303		51,344
Liabilities at March 31, 2016	$	16,350	$	7,509	$	5,881	$	31,192	$	60,932

(U.S. dollars in thousands)	Severance related costs		Retention and other compensation costs		Facilities-related costs		Consulting and other		Total
Costs incurred in 2015	$	47,185	$	35,310	$	14,744	$	59,129	$	156,368
2015 payments	31,058		18,341		13,926		35,754		99,079
Liabilities at December 31, 2015	$	16,127	$	16,969	$	818	$	23,375	$	57,289