Note 9 - Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Net Funded Status [Table Text Block]

	December 31,
	2012			2011
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	67,033		$	50,055
Service cost		4,452			3,447
Interest cost		3,315			2,943
Actuarial losses		9,546			11,521
Benefits paid		(1,110	)		(933	)
Projected benefit obligation at end of year	$	83,236		$	67,033
Change in plan assets:
Fair value of pension plan assets at beginning of year	$	35,011		$	33,039
Actual return on plan assets		3,728			275
Company contributions		9,033			2,630
Benefits paid		(1,110	)		(933	)
Fair value of pension plan assets at end of year		46,662			35,011
Funded status of pension plan	$	(36,574	)	$	(32,022	)
Amounts recognized in our balance sheets consist of:
Accrued benefit cost	$	(6,336	)	$	(7,684	)
Accumulated other comprehensive income		(30,238	)		(24,338	)
Net liability recognized	$	(36,574	)	$	(32,022	)

Schedule of Assumptions Used [Table Text Block]

	Year Ended December 31,
	2012			2011
Weighted-average assumptions used to determine net periodic benefit cost for our active pension plan:
Discount rate		4.84	%		5.85	%
Expected long-term rate of return on pension plan assets		7.00	%		7.00	%
Estimated rate of increase in compensation levels		5.63	%		5.00	%

	As of December 31,
	2012			2011
Weighted-average assumptions used to determine benefit obligations:
Discount rate		4.31	%		4.84	%
Estimated rate of increase in compensation levels		5.63	%		5.63	%

Schedule of Net Benefit Costs [Table Text Block]

	Year Ended December 31,
	2012			2011			2010
Components of net periodic pension cost:
Service cost	$	4,452		$	3,447		$	3,199
Interest cost		3,315			2,943			2,658
Expected return on plan assets		(2,609	)		(2,351	)		(1,987	)
Recognized net actuarial loss		2,527			958			912
Net periodic pension cost	$	7,685		$	4,997		$	4,782

Schedule of Expected Benefit Payments [Table Text Block]

Years	Amount
2013	$	1,594
2014		1,724
2015		1,879
2016		2,051
2017		2,203
2018 - 2022		14,625

Schedule of Allocation of Plan Assets [Table Text Block]

	As of December 31,
	2012			2011
Asset category:
Insurance general account		37	%		38	%
Cash management accounts		3	%		3	%
Equity accounts		54	%		53	%
Fixed income account		6	%		6	%
Total		100	%		100	%

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

	Target Range
Asset class:
Large cap equities	23%	to	91%
Mid cap equities	0%	to	15%
Small cap equities	0%	to	16%
International equities	5%	to	25%
Fixed income	0%	to	30%
Cash	0%	to	20%

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	As of December 31, 2012
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	17,381	$	-	$	17,381
Cash management accounts		-		1,457		-		1,457
Equity accounts		-		24,911		-		24,911
Fixed income account		-		2,913		-		2,913
Total	$	-	$	46,662	$	-	$	46,662

	As of December 31, 2011
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	13,335	$	-	$	13,335
Cash management accounts		-		846		-		846
Equity accounts		-		18,668		-		18,668
Fixed income account		-		2,162		-		2,162
Total	$	-	$	35,011	$	-	$	35,011

Capital Accumulation Plan [Member]

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

	Year Ended December 31,
	2012				2011				2010
	Shares		Amount		Shares		Amount		Shares		Amount
Matching contributions to the Capital Accumulation Plan		14	$	26		14	$	29		14	$	29