Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
NET INCOME	$ 13,491		$ 5,915		$ 2,179
Other comprehensive income (loss), net of tax:
Reclassification adjustment for realized gains on marketable securities included in net income (1)	(630)	[1]	(215)	[1]	(1,009)	[1]
Reclassification adjustment for unrealized losses on marketable securities included in net income (2)	1	[2]	18	[2]	44	[2]
Changes in fair value of marketable securities (3)	871	[3]	2,122	[3]	495	[3]
COMPREHENSIVE INCOME	$ 13,733		$ 7,840		$ 1,709

[1] Net of deferred income taxes of $(385), $(131) and $(618), respectively.

[2] Net of deferred income taxes of $0, $11 and $27, respectively.

[3] Net of deferred income taxes of $533, $1,298 and $304, respectively.