Segment Information - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) segments		Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of segments | segments	2
Net results from structured products	$ 1,970	[1]	$ 5,025
Net investment income | Total P&C
Segment Reporting Information [Line Items]
Net results from structured products	12,700		15,100
Interest Expense [Member] | Total P&C
Segment Reporting Information [Line Items]
Net results from structured products	$ (10,700)		$ (10,000)

[1] The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.