Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net Income	$ 29,505	$ 22,163	$ 51,877	$ 47,618
Other comprehensive income, net of tax:
Unrealized net holding gain on debt securities available-for-sale, net of income tax effect of $2,222 and $2,383 for the three months ended June 30, 2020 and 2019, respectively, and $7,054 and $6,249 for the six months ended June 30, 2020 and 2019, respectively.	8,359	8,967	26,535	23,508
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	15	(301)	(468)	(507)
Other comprehensive income (loss)	5,757	9,146	23,450	23,481
Comprehensive income	35,262	31,309	75,327	71,099
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	5,742	9,447	23,918	23,988
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(2,617)	480	$ (2,617)	$ 480
Accumulated Other Comprehensive Income (loss) [Member]
Other comprehensive income, net of tax:
Other comprehensive income (loss)	$ 5,757	$ 9,146