Condensed Consolidated Statements of Other Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 25,399	$ 3,190	$ 33,137	$ 11,651
Other comprehensive income (loss):
Change in unrealized value of investments	0	(128)	0	(79)
Foreign currency translation adjustment	(35)	28	(67)	(370)
Other comprehensive loss	(35)	(100)	(67)	(449)
Comprehensive income	$ 25,364	$ 3,090	$ 33,070	$ 11,202