Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 3,768	$ 2,759	$ 173	$ 7,546
Net unrealized investment gains (losses):
Unrealized holding gains (losses), net of tax	[1]	112	99	(436)	235
Reclassification adjustments included in net income (loss), net of tax	[1]	9	(17)	11	(22)
Net unrealized investment gains (losses)		121	82	(425)	213
Currency translation adjustments		(18,535)	12,136	(12,875)	18,310
Net unrealized gains (losses) on cash flow hedges		0	(51)	41	4
Comprehensive income		$ (14,646)	$ 14,926	$ (13,086)	$ 26,073

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