Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for credit losses	$ 36,442	$ 46,519
Deferred compensation	12,310	28,125
Net unrealized losses on securities included in other comprehensive income	7,465	19,036
Stock-based compensation	6,898	9,704
Loans	4,943	5,055
Other real estate owned	4,019	7,151
Federal net operating loss carryforward	3,063	7,624
AMT credit carryforward	1,199	1,872
Nonaccrued interest	983	1,884
Mortgage banking recourse obligation	722	2,025
Covered assets	0	18,484
Foreign net operating loss carryforward	0	3,476
Other	2,307	2,408
Total gross deferred tax assets	80,351	153,363
Deferred tax liabilities:
Equipment leasing	42,681	28,440
Premises and equipment	23,211	31,053
Capitalized servicing rights	8,916	7,326
Goodwill and intangible assets	7,619	10,085
Deferred loan fees and costs	3,531	5,131
Net unrealized gains on derivatives included in other comprehensive income	3,197	2,732
Fair value adjustments on loans	3,143	3,163
FHLB stock dividends	0	346
Other	3,433	6,334
Total gross deferred liabilities	95,731	94,610
Net deferred tax assets (liabilities)	$ 15,380
Net deferred tax assets (liabilities)		$ 58,753