Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for credit losses	$ 101,021	$ 41,809
Right-of-use liability	47,895	52,472
Deferred compensation	23,975	23,555
Net unrealized losses on derivatives included in other comprehensive income	8,404	4,781
Deferred loan fees and costs	3,821	0
Stock-based compensation	3,363	8,487
Federal net operating loss carryforward	2,722	4,016
Nonaccrued interest	1,949	2,164
Loans	1,196	5,673
Other real estate owned	930	2,198
AMT credit carryforward	0	1,338
Other	6,083	2,366
Total gross deferred tax assets	201,359	148,859
Deferred tax liabilities:
Equipment leasing	146,393	120,114
Premises and equipment	62,278	51,544
Right-of-use asset	39,568	43,912
Net unrealized gains on derivatives included in other comprehensive income	25,700	5,443
Capitalized servicing rights	22,367	20,277
Fair value adjustments on loans	12,042	3,603
Goodwill and intangible assets	8,227	12,819
Deferred loan fees and costs	0	4,604
Other	7,599	5,397
Total gross deferred tax liabilities	324,174	267,713
Net deferred tax liabilities	$ (122,815)	$ (118,854)