Note 21 - Condensed Financial Information (Parent Company Only) (Detail) - Consensed Statements of Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INCOME
Provision for income taxes	$ 12,331	$ 10,425	$ 17,314
NET INCOME	27,684	25,374	37,117
Condensed Statements of Income (Parent Company Only) [Member]
INCOME
Dividends from subsidiaries	45,061	19,291	18,080
Other income	7,155	6,189	6,763
	52,216	25,480	24,843
EXPENSE	15,830	13,756	15,601
Income before income taxes and equity in undistributed net income of subsidiaries	36,386	11,724	9,242
Provision for income taxes	(3,195)	(2,743)	(3,278)
Income before equity in undistributed net income of subsidiaries	39,581	14,467	12,520
(Distribution in excess) equity in undistributed net income of subsidiaries	(11,897)	10,907	24,597
NET INCOME	$ 27,684	$ 25,374	$ 37,117