Interim Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net Income	$ 13,229	$ 13,805
Other Comprehensive Income:
Unrealized gains on investments in marketable securities	9,598	15,764
Reclassification adjustment for realized gains on sale of securities	(136)	(230)
Income tax expense related to items of other comprehensive income	(3,650)	(6,090)
Other comprehensive income, net of tax	5,812	9,444
Comprehensive Income	$ 19,041	$ 23,249