Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investment securities [Abstract]
Investment Securities, Fair Value	$ 191,235	$ 231,395
Real estate and other repossessed assets, allowance	$ (5,977)	$ (6,083)
Shareholders' equity: [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.00006	$ 0.00006
Common Stock, Shares Authorized	2,500,000,000	2,500,000,000
Common Stock, Shares, Issued	(76,412,230)	(76,254,029)
Common Stock, Shares, Outstanding	(76,412,230)	(76,254,029)
Treasury Stock, Shares	8,308,187	7,786,257

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