CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	$ 19,677	$ 35,730	$ 36,580	$ 80,214
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation	(1,792)	(828)	(4,633)	(728)
Change in fair value of investments	(2)	75	(140)	362
Change in fair value of interest rate swap	77	215	250	473
Other comprehensive income (loss) before taxes	(1,717)	(538)	(4,523)	107
INCOME TAX EXPENSE (BENEFIT):
Foreign currency translation	(417)	(327)	(1,524)	(288)
Change in fair value of investments		30	(54)	143
Change in fair value of interest rate swap	30	86	98	187
Income tax expense (benefit)	(387)	(211)	(1,480)	42
NET OTHER COMPREHENSIVE INCOME (LOSS)	(1,330)	(327)	(3,043)	65
TOTAL COMPREHENSIVE INCOME	$ 18,347	$ 35,403	$ 33,537	$ 80,279