Other Noninterest Income (Components of Other Noninterest Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income Disclosure Nonoperating [Abstract]
Income from bank-owned life insurance	$ 3,907	$ 6,628	$ 14,535	$ 14,211
Credit related fees	2,568	2,911	8,383	8,585
Income from derivatives	2,970	1,739	11,755	9,718
Gain on sale of Mastercard Class B common stock			2,800
Gain on sale of Hancock Horizon Funds	4,576		4,576
Other miscellaneous	8,168	3,145	13,673	11,110
Total other noninterest income	$ 22,189	$ 14,423	$ 55,722	$ 43,624