Note 22 - Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2012

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

	As of December 31, 2012										As of December 31, 2011
	Company					Bank					Company					Bank
	Balance		Percentage			Balance		Percentage			Balance		Percentage			Balance		Percentage
	(Dollars in thousands)
Tier I Capital (to risk-weighted assets)	$	1,426,566		17.36	%	$	1,259,005		15.33	%	$	1,318,948		15.97	%	$	1,289,747		15.64	%
Tier I Capital minimum requirement		328,713		4.00			328,440		4.00			330,355		4.00			329,928		4.00
Excess	$	1,097,853		13.36	%	$	930,565		11.33	%	$	988,593		11.97	%	$	959,819		11.64	%
Total Capital (to risk-weighted assets)	$	1,571,060		19.12	%	$	1,402,691		17.08	%	$	1,474,496		17.85	%	$	1,444,165		17.51	%
Total Capital minimum requirement		657,426		8.00			656,880		8.00			660,710		8.00			659,855		8.00
Excess	$	913,634		11.12	%	$	745,811		9.08	%	$	813,786		9.85	%	$	784,310		9.51	%
Tier I Capital (to average assets)Leverage ratio	$	1,426,566		13.82	%	$	1,259,005		12.22	%	$	1,318,948		12.93	%	$	1,289,747		12.66	%
Minimum leverage requirement		412,844		4.00			412,272		4.00			408,146		4.00			407,643		4.00
Excess	$	1,013,722		9.82	%	$	846,733		8.22	%	$	910,802		8.93	%	$	882,104		8.66	%
Total average assets (1)	$	10,321,104				$	10,306,790				$	10,203,647				$	10,191,078
Risk-weighted assets	$	8,217,821				$	8,211,004				$	8,258,878				$	8,248,190