Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total noninterest income	$ 3,228,000	$ 2,645,000	$ 9,015,000	$ 6,909,000
Service Charges on Deposits
Total noninterest income	302	460	888,000	1,263,000
Investment Services and Insurance Income
Total noninterest income	167,000,000	165,000,000	525,000	487,000
Title Insurance Income
Total noninterest income	543,000,000	434,000,000	1,386,000	1,116,000
ATM and check card fees
Total noninterest income	499,000,000	378,000,000	1,394,000	1,276,000
Other
Total noninterest income	193,000,000	334,000,000	476,000	616,000
Noninterest Income (in-scope of Topic 606)
Total noninterest income	1,704,000,000	1,771,000,000	4,669,000	4,758,000
Noninterest Income (out-of-scope of Topic 606)
Total noninterest income	$ 1,524,000,000	$ 874,000,000	$ 4,346,000	$ 2,151,000