Note 15 - Employee Benefit Plans (Detail) - Pension Plan's Cost and Obligations (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated benefit obligation	$ 55,782	$ 43,889
Change in benefit obligation:
Projected benefit obligation at beginning of year	51,963	43,671
Service cost	2,725	2,352	3,404
Interest cost	3,032	2,665	3,337
Actuarial losses	8,067	4,957
Fair value of plan assets at beginning of year	54,713	51,033
Actual return on plan assets	1,053	5,362
Benefits paid	(2,776)	(1,682)
Employer contributions	10,000
Fair value of plan assets at end of year	62,990	54,713	51,033
Funded status recognized in the Consolidated Statements of Financial Condition:
Noncurrent prepaid pension		2,750
Noncurrent liabilities	(21)
Amounts recognized in accumulated other comprehensive loss:
Prior service cost	4	8
Net loss	21,860	12,996
Net amount recognized	21,864	13,004
Actuarial losses included in accumulated other comprehensive loss as a percent of:
Accumulated benefit obligation	39.20%	29.60%
Fair value of plan assets	34.70%	23.80%
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic benefit cost in the next fiscal year:
Prior service cost	(4)	(4)	(4)
Net loss	(2,260)	(2)	(1,154)
Net amount expected to be recognized	1,339	528
Weighted-average assumptions at the end of the year used to determine the actuarial present value of the projected benefit obligation:
Rate of compensation increase	2.50%	3.00%
Projected benefit obligation at end of year	63,011	51,963	43,671
Minimum [Member]
Weighted-average assumptions at the end of the year used to determine the actuarial present value of the projected benefit obligation:
Discount rate	4.40%	5.50%
Next Fiscal Year [Member]
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic benefit cost in the next fiscal year:
Prior service cost	3	3
Net loss	$ 1,336	$ 525