Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 28	$ 8,700	$ 13,773	$ 20,570
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of ($287) for the three months ended June 30, 2016, and ($348) for the six months ended June 30, 2016.	2	470	2	569
Unrealized gain on available-for-sale securities, net of tax of ($29) and ($74) for the three months ended June 30, 2017 and 2016, respectively and ($83) and ($171) for the six months ended June 30, 2017 and 2016, respectively.	46	121	134	281
Other comprehensive income	48	591	136	850
Comprehensive income	76	9,291	13,909	21,420
Comprehensive income attributable to noncontrolling interests	(333)	(612)	(1,051)	(119)
Comprehensive (Loss) Income Attributable to Stockholders	$ (257)	$ 8,679	$ 12,858	$ 21,301