Note 9 - Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

	At December 31, 2021					Required for Capital Adequacy Purposes					To Be Well-capitalized Under Prompt Corrective Action Regulations
	Amount		Ratio			Amount		Ratio			Amount		Ratio
	($ in thousands)
Common Equity Tier 1 Capital
Company	$	653,026		14.93	%	$	306,277		7.00	%		N/A		N/A
Bank		540,538		12.48	%		303,111		7.00	%	$	281,460		6.50	%
Tier 1 Capital
Company		653,026		14.93	%		371,908		8.50	%		N/A		N/A
Bank		540,538		12.48	%		368,063		8.50	%		346,412		8.00	%
Total Capital
Company		676,749		15.47	%		459,416		10.50	%		N/A		N/A
Bank		570,260		13.17	%		454,666		10.50	%		433,016		10.00	%
Leverage Ratio (1)
Company		653,026		9.06	%		288,423		4.00	%		N/A		N/A
Bank		540,538		7.55	%		286,432		4.00	%		358,040		5.00	%

	At December 31, 2020					Required for Capital Adequacy Purposes					To Be Well-capitalized Under Prompt Corrective Action Regulations
	Amount		Ratio			Amount		Ratio			Amount		Ratio
	($ in thousands)
Common Equity Tier 1 Capital
Company	$	604,833		16.04	%	$	263,903		7.00	%		N/A		N/A
Bank		484,270		13.00	%		260,755		7.00	%	$	242,130		6.50	%
Tier 1 Capital
Company		604,833		16.04	%		320,454		8.50	%		N/A		N/A
Bank		484,270		13.00	%		316,632		8.50	%		298,006		8.00	%
Total Capital
Company		628,797		16.68	%		395,855		10.50	%		N/A		N/A
Bank		514,234		13.80	%		391,133		10.50	%		372,508		10.00	%
Leverage Ratio (1)
Company		604,833		9.40	%		257,488		4.00	%		N/A		N/A
Bank		484,270		7.58	%		255,560		4.00	%		319,451		5.00	%