CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest expense	$ 3,430	$ 3,850	$ 10,514	$ 11,333
Gain (loss) on securities	1,300	2,013	4,964	7,168
Income tax expense (benefit)	13,681	7,941	27,007	29,835
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Derivatives
Interest expense	(595)	24	(1,195)	276
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Gain (loss) on securities	1,099	2,013	4,763	7,168
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income (Loss)
Income tax expense (benefit)	$ 429	$ 502	$ 1,509	$ 1,740