Note 15 - Employee Benefit Plans (Detail) - Net Periodic Benefit Pension Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Components of net periodic benefit cost:
Service cost	$ 2,862		$ 2,725		$ 2,352
Interest cost	2,720		3,032		2,665
Expected return on plan assets	(4,456)		(4,110)		(4,150)
Recognized net actuarial loss	1,684		976		2
Amortization of prior service cost	3		3		3
Other (1)		[1]	1,285	[1]		[1]
Net periodic cost	2,813		3,911		872
Other changes in plan assets and benefit obligations recognized as a charge to other comprehensive (loss) income:
Amortization of prior service cost	(4)		(4)		(4)
Amortization of net loss	(1,683)		(2,260)		(2)
Total unrealized loss	6,520		8,860		3,740
Total recognized in net periodic pension cost and other comprehensive loss	9,333		12,771		4,612
Weighted-average assumptions used to determine the net periodic cost:
Discount rate	4.40%		5.50%		6.00%
Expected return on plan assets	7.25%		7.50%		7.50%
Change In Plan [Member]
Other changes in plan assets and benefit obligations recognized as a charge to other comprehensive (loss) income:
Net loss for the period	$ 8,207		$ 11,124		$ 3,746
Periodic Cost [Member]
Weighted-average assumptions used to determine the net periodic cost:
Rate of compensation increase	2.50%		3.00%		3.00%

[1] The 2011 amount represents the correction of a 2010 actuarial pension expense calculation related to the valuation of future early retirement benefits.