CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest expense	$ 3,850	$ 3,660	$ 11,333	$ 10,726
Gain (loss) on securities	2,013	(145)	7,168	1,037
Income tax expense (benefit)	7,941	8,956	29,835	21,530
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Derivatives
Interest expense	24	242	276	469
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Gain (loss) on securities	2,013	(145)	7,168	1,037
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income (Loss)
Income tax expense (benefit)	$ 502	$ (26)	$ 1,740	$ 174