Note 9 - Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2014

Note 9 - Retirement Plans (Tables) [Line Items]

Schedule of Net Funded Status [Table Text Block]

	December 31,
	2014			2013
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	83,533		$	83,236
Service cost		5,162			5,165
Interest cost		4,106			3,553
Actuarial losses (gains)		16,712			(7,158	)
Benefits paid		(1,507	)		(1,263	)
Projected benefit obligation at end of year	$	108,006		$	83,533
Change in plan assets:
Fair value of pension plan assets at beginning of year	$	58,063		$	46,662
Actual return on plan assets		3,940			8,216
Company contributions		6,317			4,448
Benefits paid		(1,507	)		(1,263	)
Fair value of pension plan assets at end of year		66,813			58,063
Funded status of pension plan	$	(41,193	)	$	(25,470	)
Amounts recognized in our balance sheets consist of:
Accrued benefit cost	$	(10,057	)	$	(10,337	)
Accumulated other comprehensive income		(31,136	)		(15,133	)
Net liability recognized	$	(41,193	)	$	(25,470	)

Schedule of Assumptions Used [Table Text Block]

	Year Ended December 31,
	2014			2013
Weighted-average assumptions used to determine net periodic benefit cost for our active pension plan:
Discount rate		4.97	%		4.31	%
Expected long-term rate of return on pension plan assets		7.00	%		7.00	%
Estimated rate of increase in compensation levels		5.63	%		5.63	%

	As of December 31,
	2014			2013
Weighted-average assumptions used to determine benefit obligations:
Discount rate		4.00	%		4.97	%
Estimated rate of increase in compensation levels		5.63	%		5.63	%

Schedule of Net Benefit Costs [Table Text Block]

	Year Ended December 31,
	2014			2013			2012
Components of net periodic pension cost:
Service cost	$	5,162		$	5,165		$	4,452
Interest cost		4,106			3,553			3,315
Expected return on plan assets		(4,200	)		(3,400	)		(2,609	)
Recognized net actuarial loss		969			3,131			2,527
Net periodic pension cost	$	6,037		$	8,449		$	7,685

Schedule of Expected Benefit Payments [Table Text Block]

Years			Amount
2015			$	1,989
2016				2,218
2017				2,455
2018				2,695
2019				3,071
2020	-	2024		23,153

Defined Benefit Plan, Fair Value of Plan Assets [Table Text Block]

	As of December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	18,598	$	-	$	18,598
Cash management accounts		-		2,319		-		2,319
Equity accounts		-		42,608		-		42,608
Fixed income account		-		3,288		-		3,288
Total	$	-	$	66,813	$	-	$	66,813

	As of December 31, 2013
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	18,759	$	-	$	18,759
Cash management accounts		-		1,959		-		1,959
Equity accounts		-		34,603		-		34,603
Fixed income account		-		2,742		-		2,742
Total	$	-	$	58,063	$	-	$	58,063

Capital Accumulation Plan [Member]

Note 9 - Retirement Plans (Tables) [Line Items]

Defined Contribution Plan Disclosures [Table Text Block]

	Year Ended December 31,
	2014				2013				2012
	Shares		Amount		Shares		Amount		Shares		Amount
Matching contributions to the Capital Accumulation Plan		2,341	$	25		5,235	$	28		14,293	$	26

Asset Categories [Member]

Note 9 - Retirement Plans (Tables) [Line Items]

Schedule of Allocation of Plan Assets [Table Text Block]

	As of December 31,
	2014			2013
Asset category:
Insurance general account		28	%		32	%
Cash management accounts		3	%		3	%
Equity accounts		64	%		60	%
Fixed income account		5	%		5	%
Total		100	%		100	%

Asset Classes [Member]

Note 9 - Retirement Plans (Tables) [Line Items]

Schedule of Allocation of Plan Assets [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%