Mortgage Banking - Servicing Portfolio (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2019 USD ($) Loan
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Mortgage Loans On Banking Number Of Loans | Loan	25,944	14,878
Investor, Principal Outstanding | $	$ 2,947,045	$ 1,461,645
Fannie Mae [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Mortgage Loans On Banking Number Of Loans | Loan	8,365	4,915
Investor, Principal Outstanding | $	$ 998,359	$ 465,982
Freddie Mac [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Mortgage Loans On Banking Number Of Loans | Loan	17,385	9,833
Investor, Principal Outstanding | $	$ 1,925,717	$ 977,649
Other Mortgage Banking [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Mortgage Loans On Banking Number Of Loans | Loan	105	12
Investor, Principal Outstanding | $	$ 9,826	$ 450
Federal Home Loan Bank [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Mortgage Loans On Banking Number Of Loans | Loan	89	118
Investor, Principal Outstanding | $	$ 13,143	$ 17,564