Note 9 - Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Net Funded Status [Table Text Block]

	December 31,
	2018			2017
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	126,086		$	114,976
Interest cost		4,424			4,669
Actuarial gains		(10,940	)		-
Benefits paid		(2,916	)		(3,529	)
Merger of assumed plans		-			9,970
Projected benefit obligation at end of year	$	116,654		$	126,086
Change in plan assets:
Fair value of pension plan assets at beginning of year	$	88,248		$	80,929
Actual return on plan assets		(4,417	)		7,724
Company contributions		2,500			3,124
Benefits paid		(2,916	)		(3,529	)
Fair value of pension plan assets at end of year		83,415			88,248
Funded status of pension plan	$	(33,239	)	$	(37,838	)
Amounts recognized on our balance sheets consist of:
Accrued benefit cost	$	2,041		$	(1,502	)
Accumulated other comprehensive loss		(35,280	)		(36,336	)
Net liability recognized	$	(33,239	)	$	(37,838	)

Schedule of Assumptions Used [Table Text Block]

	Year Ended December 31,
	2018			2017
Weighted-average assumptions used to determine net periodic benefit cost for the Gray Pension Plan:
Discount rate		3.55	%		4.11	%
Expected long-term rate of return on pension plan assets		7.00	%		7.00	%
Estimated rate of increase in compensation levels		N/A			N/A

	As of December 31,
	2018			2017
Weighted-average assumptions used to determine benefit obligations:
Discount rate		4.16	%		3.55	%

Schedule of Net Benefit Costs [Table Text Block]

	Year Ended December 31,
	2018			2017			2016
Components of net periodic pension cost:
Service cost	$	-		$	-		$	-
Interest cost		4,424			4,670			4,398
Expected return on plan assets		(6,145	)		(5,648	)		(4,836	)
Recognized net actuarial loss		678			484			406
Net periodic pension benefit	$	(1,043	)	$	(494	)	$	(32	)

Schedule of Expected Benefit Payments [Table Text Block]

Years	Amount
2019	$	3,371
2020		3,845
2021		4,102
2022		4,383
2023		4,648
2024 - 2028		28,479

Schedule of Allocation of Plan Assets by Asset Category [Table Text Block]

	As of December 31,
	2018			2017
Asset category:
Insurance general account		19	%		19	%
Cash management accounts		1	%		4	%
Equity accounts		47	%		42	%
Fixed income accounts		31	%		31	%
Real estate accounts		2	%		4	%
Total		100	%		100	%

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%

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

	As of December 31, 2018
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	16,458	$	-	$	16,458
Cash management accounts		721		-		-		721
Equity accounts		39,047		-		-		39,047
Fixed income accounts		25,878		-		-		25,878
Real estate accounts		1,311		-		-		1,311
Total	$	66,957	$	16,458	$	-	$	83,415

	As of December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Insurance general account	$	-	$	16,873	$	-	$	16,873
Cash management accounts		3,229		-		-		3,229
Equity accounts		37,536		-		-		37,536
Fixed income account		27,146		-		-		27,146
Real estate accounts		3,464		-		-		3,464
Total	$	71,375	$	16,873	$	-	$	88,248