Note 14 - Regulatory Capital (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	June 30, 2018					December 31, 2017
	Amount		Percent of Assets			Amount		Percent of Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	644,880		9.90	%	$	631,285		10.11	%
Requirement to be well capitalized		325,697		5.00			312,343		5.00
Excess		319,183		4.90			318,942		5.11
Common Equity Tier I risk-based capital:
Capital level	$	644,880		13.37	%	$	631,285		13.87	%
Requirement to be well capitalized		313,524		6.50			295,937		6.50
Excess		331,356		6.87			335,348		7.37
Tier 1 risk-based capital:
Capital level	$	644,880		13.37	%	$	631,285		13.87	%
Requirement to be well capitalized		385,876		8.00			364,230		8.00
Excess		259,004		5.37			267,055		5.87
Total risk-based capital:
Capital level	$	665,100		13.79	%	$	651,636		14.31	%
Requirement to be well capitalized		482,345		10.00			455,288		10.00
Excess		182,755		3.79			196,348		4.31

	June 30, 2018					December 31, 2017
	Amount		Percent of Assets			Amount		Percent of Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	572,189		8.79	%	$	563,426		9.02	%
Requirement to be well capitalized		325,615		5.00			312,278		5.00
Excess		246,574		3.79			251,148		4.02
Common Equity Tier I risk-based capital:
Capital level	$	534,036		11.07	%	$	527,727		11.59	%
Requirement to be well capitalized		313,460		6.50			295,865		6.50
Excess		220,576		4.57			231,862		5.09
Tier 1 risk-based capital:
Capital level	$	572,189		11.87	%	$	563,426		12.38	%
Requirement to be well capitalized		385,797		8.00			364,141		8.00
Excess		186,392		3.87			199,285		4.38
Total risk-based capital:
Capital level	$	667,409		13.84	%	$	658,777		14.47	%
Requirement to be well capitalized		482,246		10.00			455,177		10.00
Excess		185,163		3.84			203,600		4.47