Note 15 - Employee Benefit Plans (Detail) - Net Periodic Benefit Pension Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Components of net periodic benefit cost:
Service cost	$ 2,725		$ 2,352		$ 3,404
Interest cost	3,032		2,665		3,337
Expected return on plan assets	(4,110)		(4,150)		(4,558)
Recognized net actuarial loss	976		2		1,153
Amortization of prior service cost	3		3		3
Other (1)	1,285	[1]		[1]	737	[1]
Net periodic cost	3,911		872		4,076
Other changes in plan assets and benefit obligations recognized as a charge to other comprehensive income (loss):
Amortization of prior service cost	(4)		(4)		(4)
Amortization of net loss	(2,260)		(2)		(1,154)
Total	8,860		3,740		(16,988)
Total recognized in net periodic pension cost and other comprehensive loss	12,771		4,612		(12,912)
Weighted-average assumptions used to determine the net periodic cost:
Discount rate	5.50%		6.00%		6.25%
Expected return on plan assets	7.50%		7.50%		8.50%
Change In Plan [Member]
Other changes in plan assets and benefit obligations recognized as a charge to other comprehensive income (loss):
Net loss (gain) for the period	$ 11,124		$ 3,746		$ (15,830)
Periodic Cost [Member]
Weighted-average assumptions used to determine the net periodic cost:
Rate of compensation increase	3.00%		3.00%		4.50%

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