Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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+ Details

Recent Accounting Pronouncements (Narrative) (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jan. 01, 2020 USD ($) segment	Dec. 31, 2019 USD ($) segment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net reduction of retained earnings upon adoption of ASC 326	$ (650,139)	$ (648,997)	$ (617,213)	$ (624,709)	$ (603,981)	$ (594,674)	$ (583,540)		$ (573,820)
Allowance for credit losses	37,798	39,995		46,859	46,768	42,431		$ 31,931	$ 16,278
Number of loan segments \| segment								8	6
Accrued interest receivable on loans	11,641			14,133
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net reduction of retained earnings upon adoption of ASC 326	$ (336,647)	$ (320,717)	$ (302,450)	$ (288,447)	$ (272,579)	$ (263,011)	$ (253,780)		$ (253,090)
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net reduction of retained earnings upon adoption of ASC 326									6,717
Allowance for credit losses								$ 15,653
Impact of ASC 326 Adoption \| PCD Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses								6,886	6,886
Impact of ASC 326 Adoption \| Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net reduction of retained earnings upon adoption of ASC 326								$ 6,717	$ 6,717