Interim Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income	$ 12,358	$ 12,511	$ 25,600	$ 25,740
Other Comprehensive Income (Loss):
Unrealized (losses) gains on investments in marketable securities	(19,072)	5,693	(15,085)	15,291
Reclassification adjustment for realized gains on sale of securities	(80)	(36)	(421)	(172)
Income tax benefit (expense) related to items of other comprehensive income	7,379	(2,146)	6,013	(5,796)
Other comprehensive income (loss), net of tax	(11,773)	3,511	(9,493)	9,323
Comprehensive Income	$ 585	$ 16,022	$ 16,107	$ 35,063