Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income	$ 22,372	$ 25,455
Other comprehensive income, net of tax:
Unrealized net holding gain on debt securities available-for-sale, net of income tax effect of $4,832 and $3,866 for the three months ended March 31, 2020 and 2019, respectively.	18,176	14,541
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(483)	(206)
Other comprehensive income (loss)	17,693	14,335
Comprehensive income	40,065	39,790
Accumulated Other Comprehensive Income (loss) [Member]
Other comprehensive income, net of tax:
Other comprehensive income (loss)	$ 17,693	$ 14,335