Employee Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2016

Pension plan

Employee retirement plans

Schedule of reconciliation of the beginning and ending balances of the projected benefit obligation, fair value of plan assets, funded status of plans, and amounts recognized in the consolidated balance sheets.

	December 31
	2016		2015
Benefit obligation at beginning of year	$	37,217	$	38,362
Service cost		321		257
Interest cost		1,639		1,489
Actuarial (gain) loss		1,469		(1,662)
Benefits paid		(1,239)		(1,229)
Benefit obligation at end of year		39,407		37,217
Fair value of plan assets at beginning of year		26,378		26,046
Actual return (loss) on plan assets		2,373		(214)
Employer contributions through December 31		1,711		1,775
Benefits paid		(1,239)		(1,229)
Fair value of plan assets at end of year		29,223		26,378
	$	(10,184)	$	(10,839)

Schedule of components of net periodic pension or other postretirement benefit cost

		2016		2015		2014
Components of net periodic pension cost:
Service cost	$	321	$	257	$	216
Interest cost		1,639		1,489		1,496
Expected return on plan assets		(1,824)		(1,630)		(1,631)
Amortization of net loss		724		1,021		203
Net periodic pension cost	$	860	$	1,137	$	284

Schedule of assumptions used in determining net periodic costs and summary of healthcare cost trend rates

	Year ended December 31
	2016			2015			2014
Discount rates		4.5	%		3.9%  - 4.0	%	4.8%  - 4.9	%
Rates of increase in compensation levels:
Salaried		3.5			3.5		3.5
Hourly		N/A			N/A		N/A
Expected long-term rate of return on assets		7.25			7.25		7.25

Schedule of expected benefit payments

2017	$	1,400
2018		1,430
2019		1,410
2020		1,480
2021		1,530
2022-2026		9,560

Schedule of weighted-average asset allocation and actual allocation for the qualified pension plans by asset category

	Target			2016				2015
Large Cap Equity		36	%	$	10,435	36	%	$	8,819	34	%
Mid Cap Equity		3	%		929	3	%		774	3	%
Small Cap Equity		1	%		349	1	%		283	1	%
International Equity		12	%		3,479	12	%		2,633	10	%
Emerging Markets Equity		2	%		462	2	%		640	2	%
Fixed Income and Cash Equivalents		40	%		11,821	40	%		10,554	40	%
Real Estate		6	%		1,748	6	%		2,675	10	%
Total		100	%	$	29,223	100	%	$	26,378	100	%

Schedule of fair values of the Company's pension plan assets

The fair values of the Company’s pension plan assets as of December 31, 2016 are as follows:

	Balance as of December 31, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Equity holdings	$	15,654	$	—	$	15,654	$	—
Fixed-income holdings		11,821		—		11,821		—
Alternative investments		1,748		—		—		1,748
Total pension plan assets	$	29,223	$	—	$	27,475	$	1,748

The fair values of the Company’s pension plan assets as of December 31, 2015 are as follows:

	Balance as of December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Equity holdings	$	14,460	$	—	$	14,460	$	—
Fixed-income holdings		10,554		—		10,554		—
Alternative investments		1,364		—		—		1,364
Total pension plan assets	$	26,378	$	—	$	25,014	$	1,364

Schedule of reconciliation of the fair value measurements using significant unobservable inputs (Level 3)

	December 31,
		2016		2015
Balance, beginning of year	$	1,364	$	1,316
Deposits		101		89
Actual return on plan assets held at reporting date		138		173
Withdrawals		145		(214)
Balance, end of year	$	1,748	$	1,364

Other postretirement benefit cost

Employee retirement plans

Schedule of reconciliation of the beginning and ending balances of the projected benefit obligation, fair value of plan assets, funded status of plans, and amounts recognized in the consolidated balance sheets.

	December 31
	2016		2015
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	6,896	$	7,044
Service cost		210		229
Interest cost		278		256
Participant contributions		38		45
Changes in actuarial assumptions		53		(508)
Benefits paid		(142)		(170)
Projected benefit obligation at end of year	$	7,333	$	6,896
Amounts recognized in the consolidated balance sheets consisted of:
Accrued expenses and other current liabilities	$	140	$	240
Retiree health benefit obligation		7,193		6,656
	$	7,333	$	6,896

Schedule of components of net periodic pension or other postretirement benefit cost

		2016		2015		2014
Components of net postretirement health benefit cost:
Service cost	$	210	$	229	$	159
Interest cost		278		256	213
Amortization of net gain		(127)		(69)	(398)
Net postretirement healthcare benefit cost (income)	$	361	$	416	$	(26)

Schedule of assumptions used in determining net periodic costs and summary of healthcare cost trend rates

	Year Ended December 31
	2016			2015			2014
Discount rate		4.1	%		3.7	%	4.5	%
Immediate healthcare cost trend rate		*			**		***
Ultimate healthcare cost trend rate		4.5			4.5		4.5
Assumed annual reduction in trend rate		*			**		***
Participation		60			60		60

* Health Care Cost Trend rate is assumed to be 7.0%  beginning in 2016 gradually reducing to an ultimate rate of 4.5% in 2025.

**Health Care Cost Trend rate is assumed to be 7.0%  beginning in 2015 gradually reducing to an ultimate rate of 4.5% in 2024.

***Health Care Cost Trend rate is assumed to be 7.0%  and 6.0% for Pre-65 participants and Post – 65 participants, respectively, beginning in 2014 gradually reducing to an ultimate rate of 4.5% in 2023.

Schedule of effect of one percentage point change in the healthcare cost trend rate

	1%		1%
	Increase		Decrease
Effect on total service and interest cost	$	62	$	(54)
Effect on postretirement benefit obligation		822		(721)