Note 8 - Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Net Funded Status [Table Text Block]

	December 31,
	2016			2015
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	103,199		$	108,006
Service cost		-			3,130
Interest cost		4,398			4,159
Actuarial losses		1,839			420
Benefits paid		(2,790	)		(1,683	)
Effect of pension curtailment		-			(10,833	)
Merger of the Assumed Plans		8,330			-
Projected benefit obligation at end of year	$	114,976		$	103,199
Change in plan assets:
Fair value of pension plan assets at beginning of year	$	69,246		$	66,813
Actual return on plan assets		5,918			(1,034	)
Company contributions		2,775			5,150
Benefits paid		(2,790	)		(1,683	)
Merger of the Assumed Plans		5,780			-
Fair value of pension plan assets at end of year		80,929			69,246
Funded status of pension plan	$	(34,047	)	$	(33,953	)
Amounts recognized in our balance sheets consist of:
Accrued benefit cost	$	(5,121	)	$	(8,994	)
Accumulated other comprehensive loss		(28,926	)		(24,959	)
Net liability recognized	$	(34,047	)	$	(33,953	)

Schedule of Assumptions Used [Table Text Block]

	Year Ended December 31,
	2016		2015
Weighted-average assumptions used to determine net periodic benefit cost for the Gray pension plan:
Discount rate		4.31%		4.00%
Expected long-term rate of return on pension plan assets		7.00%		7.00%
Estimated rate of increase in compensation levels		N/A		5.63%

	As of December 31,
	2016		2015
Weighted-average assumptions used to determine benefit obligations:
Discount rate		4.11%		4.31%

Schedule of Net Benefit Costs [Table Text Block]

	Year Ended December 31,
	2016			2015			2014
Components of net periodic pension cost:
Service cost	$	-		$	3,130		$	5,162
Interest cost		4,398			4,159			4,106
Expected return on plan assets		(4,836	)		(4,782	)		(4,200	)
Recognized net actuarial loss		406			1,580			969
Net periodic pension (benefit) cost	$	(32	)	$	4,087		$	6,037

Schedule of Expected Benefit Payments [Table Text Block]

Years			Amount
	2017		$	2,722
	2018			2,933
	2019			3,299
	2020			3,790
	2021			4,090
2022	-	2026		25,216

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

	As of December 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	18,357	$	-	$	18,357
Cash management accounts		5,089		-		-		5,089
Equity accounts		31,963		-		-		31,963
Fixed income accounts		22,544		-		-		22,544
Real estate accounts		2,976		-		-		2,976
Total	$	62,572	$	18,357	$	-	$	80,929

	As of December 31, 2015
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	17,918	$	-	$	17,918
Cash management accounts		1,273		-		-		1,273
Equity accounts		37,621		-		-		37,621
Fixed income account		9,924		-		-		9,924
Real estate accounts		2,510		-		-		2,510
Total	$	51,328	$	17,918	$	-	$	69,246

Asset Classes [Member]

Notes Tables

Schedule of Allocation of Plan Assets [Table Text Block]

	Target Range
Asset class:	Strategic Allocation		Lower Limit		Upper Limit
Equities:
Large cap value		5%		0%		50%
Large cap blend		5%		0%		50%
Large cap growth		5%		0%		50%
Mid cap blend		15%		0%		40%
Small cap core		5%		0%		25%
Foreign large blend		10%		0%		40%
Emerging markets		10%		0%		25%
Real estate		5%		0%		20%
Fixed Income:
U.S. Treasury inflation protected		5%		0%		25%
Intermediate term bond		10%		0%		50%
Long term government bond		5%		0%		40%
High yield bond		10%		0%		25%
Emerging markets bond		10%		0%		20%
Money market taxable		0%		0%		100%

Asset Categories [Member]

Notes Tables

Schedule of Allocation of Plan Assets [Table Text Block]

	As of December 31,
	2016		2015
Asset category:
Insurance general account		23%		26%
Cash management accounts		6%		2%
Equity accounts		39%		54%
Fixed income accounts		28%		14%
Real estate accounts		4%		4%
Total		100%		100%

Capital Accumulation Plan [Member]

Notes Tables

Defined Contribution Plan Disclosures [Table Text Block]

	Year Ended December 31,
	2016				2015				2014
	Shares		Amount		Shares		Amount		Shares		Amount
Matching contributions to the Capital Accumulation Plan		2,571	$	29		1,898	$	26		2,341	$	25