Consolidated Condensed Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income	$ 21,827	$ 20,034	$ 41,446	$ 40,744
Other comprehensive income, net of tax:
Unrealized net holding gain (loss) on securities available-for-sale, net of income taxes	13,079	(20,537)	24,020	(22,916)
Other comprehensive income (loss)	13,079	(20,537)	24,020	(22,916)
Comprehensive income	$ 34,906	$ (503)	$ 65,466	$ 17,828