Note 14 - Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block [Abstract]

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

	December 31, 2014					December 31, 2013
	Amount		Percent of Assets			Amount		Percent of Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	472,251		9.63	%	$	447,305		9.48	%
Requirement to be well capitalized		245,254		5.00			235,992		5.00
Excess		226,997		4.63			211,313		4.48
Tier I risk-based capital:
Capital level	$	472,251		13.87	%	$	447,305		14.59	%
Requirement to be well capitalized		204,354		6.00			183,944		6.00
Excess		267,897		7.87			263,361		8.59
Total risk-based capital:
Capital level	$	497,347		14.60	%	$	479,081		15.63	%
Requirement to be well capitalized		340,589		10.00			306,573		10.00
Excess		156,758		4.60			172,508		5.63

	December 31, 2014					December 31, 2013
	Amount		Percent of Assets			Amount		Percent of Assets
	(Dollars in thousands)
Tier I (leverage) capital:
Capital level	$	471,233		9.62	%	$	456,772		9.70	%
Requirement to be well capitalized		244,960		5.00			235,547		5.00
Excess		226,273		4.62			221,225		4.70
Tier I risk-based capital:
Capital level	$	471,233		13.87	%	$	456,772		14.93	%
Requirement to be well capitalized		203,878		6.00			183,579		6.00
Excess		267,355		7.87			273,193		8.93
Total risk-based capital:
Capital level	$	496,329		14.61	%	$	488,548		15.97	%
Requirement to be well capitalized		339,797		10.00			305,966		10.00
Excess		156,532		4.61			182,582		5.97