CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 34,263	$ 38,817
Other comprehensive income (loss), net of tax:
Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $8,071 and $5,580	30,364	20,990
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $276 and $82	(1,038)	(309)
Reclassification adjustment for net gains included in net income, net of tax of $943 and $227	(3,544)	(854)
Total other comprehensive income, net of tax	25,782	19,827
Comprehensive income	$ 60,045	$ 58,644