Note 11 - Employee Benefit Programs (Detail) - Obligations and Funded Status: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in benefit obligation:
Benefit obligation at beginning of year	$ 85,681	$ 80,422
Interest cost	3,991	4,123	4,217
Fair value of plan assets at beginning of year	58,625	59,728
Actual return on plan assets	6,835	(1,012)
Employer contributions	5,532	3,850
Benefits paid	(4,160)	(3,941)
Fair value of plan assets at end of year	66,832	58,625	59,728
Actuarial loss	10,177	5,077
Benefit obligation at end of year	95,689	85,681	80,422
Funded status	$ (28,857)	$ (27,056)