COVID-19 and CARES Act Loan Activities (Details) $ in Thousands	Oct. 31, 2020 USD ($) Loan	Sep. 30, 2020 USD ($) Loan Customer
One Time [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		3,274
Amount of loan deferrals		$ 715,798
Two Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		189
Amount of loan deferrals		$ 210,538
Three Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		5
Amount of loan deferrals		$ 1,392
Resumed Payments [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		2,553
Amount of loan deferrals		$ 504,245
PPP Loans of $50 Thousand or Less [Member] | Subsequent Event [Member]
COVID-19 [Abstract]
Number of PPP loans | Loan	2,031
Amount of PPP loans	$ 37,700
Commercial Loan [Member] | One Time [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		829
Amount of loan deferrals		$ 620,509
Commercial Loan [Member] | Two Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		125
Amount of loan deferrals		$ 203,431
Commercial Loan [Member] | Three Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		4
Amount of loan deferrals		$ 1,365
Commercial Loan [Member] | Resumed Payments [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		617
Amount of loan deferrals		$ 435,296
Residential Loan [Member] | One Time [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		500
Amount of loan deferrals		$ 59,660
Residential Loan [Member] | Two Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		59
Amount of loan deferrals		$ 7,026
Residential Loan [Member] | Three Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		1
Amount of loan deferrals		$ 27
Residential Loan [Member] | Resumed Payments [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		290
Amount of loan deferrals		$ 37,778
Consumer Loan [Member] | One Time [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		1,945
Amount of loan deferrals		$ 35,629
Consumer Loan [Member] | Two Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		5
Amount of loan deferrals		$ 81
Consumer Loan [Member] | Three Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		0
Amount of loan deferrals		$ 0
Consumer Loan [Member] | Resumed Payments [Member]
COVID-19 [Abstract]
Number of loan deferrals | Customer		1,646
Amount of loan deferrals		$ 31,171
COVID-19 [Member] | Paycheck Protection Program [Member]
COVID-19 [Abstract]
Number of loans closed | Loan		2,962
Amount of loans closed		$ 277,000
COVID-19 [Member] | PPP Loans Under $350 Thousand [Member]
COVID-19 [Abstract]
Number of loans closed | Loan		2,817
COVID-19 [Member] | PPP Loans Between $350 Thousand and $2.0 Million [Member]
COVID-19 [Abstract]
Number of loans closed | Loan		132
COVID-19 [Member] | PPP Loans Over $2.0 Million [Member]
COVID-19 [Abstract]
Number of loans closed | Loan		13
COVID-19 [Member] | Serviced Loan [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan		73
Amount of loan deferrals		$ 9,200