Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
NET INCOME	$ 5,369		$ 1,357
Other comprehensive income, net of tax:
Changes in fair value of marketable securities (1)	62	[1]	422	[1]
COMPREHENSIVE INCOME	$ 5,431		$ 1,779

[1] Net of deferred income taxes of $38 and $259, respectively.