Note 13 - Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

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

	September 30, 2017					December 31, 2016
			Percent of					Percent of
	Amount		Assets			Amount		Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	629,748		10.10	%	$	607,033		10.12	%
Requirement to be well capitalized		311,625		5.00			299,848		5.00
Excess		318,123		5.10			307,185		5.12
Common Equity Tier I risk-based capital:
Capital level	$	629,748		14.04	%	$	607,033		14.12	%
Requirement to be well capitalized		291,614		6.50			279,443		6.50
Excess		338,134		7.54			327,590		7.62
Tier 1 risk-based capital:
Capital level	$	629,748		14.04	%	$	607,033		14.12	%
Requirement to be well capitalized		358,910		8.00			343,930		8.00
Excess		270,838		6.04			263,103		6.12
Total risk-based capital:
Capital level	$	655,017		14.60	%	$	629,262		14.64	%
Requirement to be well capitalized		448,637		10.00			429,913		10.00
Excess		206,380		4.60			199,349		4.64

	September 30, 2017					December 31, 2016
			Percent of					Percent of
	Amount		Assets			Amount		Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	565,265		9.07	%	$	539,228		9.00	%
Requirement to be well capitalized		311,475		5.00			299,654		5.00
Excess		253,790		4.07			239,574		4.00
Common Equity Tier I risk-based capital:
Capital level	$	530,442		11.84	%	$	506,432		11.79	%
Requirement to be well capitalized		291,325		6.50			279,121		6.50
Excess		239,117		5.34			227,311		5.29
Tier 1 risk-based capital:
Capital level	$	565,265		12.61	%	$	539,228		12.56	%
Requirement to be well capitalized		358,554		8.00			343,534		8.00
Excess		206,711		4.61			195,694		4.56
Total risk-based capital:
Capital level	$	665,534		14.85	%	$	636,457		14.82	%
Requirement to be well capitalized		448,193		10.00			429,417		10.00
Excess		217,341		4.85			207,040		4.82