CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 36,210	$ 36,757	$ 103,465	$ 116,630
Other comprehensive income (loss), net of tax:
Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $749, $3,034, $12,156, and $13,436	2,819	11,415	45,729	50,545
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $1, $37, $305, and $267	7	(141)	(1,146)	(1,003)
Reclassification adjustment for net gains included in net income, net of tax of $320, $61, $1,857, and $657	(1,203)	(228)	(6,989)	(2,472)
Total other comprehensive income, net of tax	1,623	11,046	37,594	47,070
Comprehensive income	$ 37,833	$ 47,803	$ 141,059	$ 163,700