Goodwill and Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Core Deposits [Member]
Estimated future amortization expense
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 8,811
Finite-Lived Intangible Assets, Amortization Expense, Year Two	8,811
Finite-Lived Intangible Assets, Amortization Expense, Year Three	8,811
Finite-Lived Intangible Assets, Amortization Expense, Year Four	8,811
Finite-Lived Intangible Assets, Amortization Expense, Year Five	8,811
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	14,038
Total Estimated Amortization Expense	58,093	$ 66,904	$ 68,274
Other Intangible Assets [Member]
Estimated future amortization expense
Total Estimated Amortization Expense	0	$ 1,350	$ 20,027
Servicing Contracts [Member]
Estimated future amortization expense
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	8,901
Finite-Lived Intangible Assets, Amortization Expense, Year Two	9,614
Finite-Lived Intangible Assets, Amortization Expense, Year Three	7,811
Finite-Lived Intangible Assets, Amortization Expense, Year Four	6,490
Finite-Lived Intangible Assets, Amortization Expense, Year Five	5,423
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	18,444
Total Estimated Amortization Expense	$ 56,682