Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (3,595)	$ 4,787
Net unrealized investment gains (losses):
Unrealized holding gains (losses), net of tax	[1]	(548)	135
Reclassification adjustments included in net income (loss), net of tax	[1]	2	(4)
Net unrealized investment gains (losses)		(546)	131
Currency translation adjustments		5,660	6,174
Net unrealized gains (losses) on cash flow hedges		(41)	55
Comprehensive income		$ 1,478	$ 11,147

[1] Tax effects were less than $0.1 million for the periods presented above.