Other Noninterest Income (Components of Other Noninterest Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income Disclosure Nonoperating [Abstract]
Income from bank-owned life insurance	$ 3,317	$ 4,083	$ 7,583	$ 7,348
Credit related fees	2,609	2,937	5,674	5,532
Income from derivatives	4,108	3,600	7,979	4,409
Other miscellaneous	3,100	4,360	8,077	7,159
Total other noninterest income	$ 13,134	$ 14,980	$ 29,313	$ 24,448