CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 28,274	$ (1,412)	$ 76,158	$ 23,435
Other comprehensive income (loss):
Currency translation adjustment		(4,981)	(12,248)	31,361	(28,951)
Change in fair value of investment in common stock of Enova (1)	[1]	0	(1,753)	0	(1,753)
Comprehensive income (loss)		$ 23,293	$ (15,413)	$ 107,519	$ (7,269)

[1] Net of tax benefit of $1,031 for the three and nine months ended September 30, 2016.